Maintenance procedure · Written to ASD-STE100 Issue 9 · Formatted to ANSI Z535

Front-Load Washing Machine Door Seal Cleaning

Front-load washing machines — clearing the rubber door gasket of trapped objects, slime and mould, and what the manufacturers actually say about bleach
ApplicabilityFront-load washing machines and washer-dryer combination machines with a flexible rubber door seal around the drum opening
Task time34 min to 44 min editorial estimate, not a measurement
PersonnelOne
Revisionv1 · 2026-07-29
BEFORE YOU BEGIN

Before you begin. This procedure is general reference information, not professional advice. Equipment varies by manufacturer, model, and year. Always follow the documentation supplied with your equipment — where it differs from this page, follow the manufacturer. Verify that you have the tools, the working conditions, and the ability to do this task safely. If anything is unclear, if the equipment is damaged, or if the task exceeds your experience, stop and use a qualified professional. You are responsible for your own safety and for the outcome. This site accepts no liability for any loss, damage, or injury arising from the use of this information.

Specifications marked unverified could not be traced to a manufacturer source. Do not rely on them — obtain the value from your equipment documentation.

Summary

The rubber ring around the door of a front-loading washer is the part that stays wet. Water, lint and detergent sit in the fold at the bottom of it after every wash, and that is where the black speckling, the grey slime and the smell that survives three hot washes all come from. It is also where socks, coins, hair grips and the occasional piece of broken glass end up. The job is ten minutes with a cloth, and nothing about it is difficult.

The difficult part is chemical, and it is the reason this page exists. Whirlpool tells you to wipe the seal with a dilute chlorine bleach solution. LG tells you to use oxygen bleach at roughly a fiftieth of that strength. Bosch tells you not to put chlorine near the seal at all because it degrades the rubber. GE offers bleach or vinegar and adds a rinse the other two do not. This page prints all four positions with their sources and refuses to pick one for you, because the right answer is written in the manual for your machine and nowhere else.

Necessary equipment

ItemNote
Rubber glovesThe CDC tells you to wear gloves when you use bleach.
Eye protectionA splash of bleach can injure an eye.
Soft clothsUse one cloth for the cleaner and one cloth to dry the seal.
Flashlight optionalThe fold below the seal is a dark space.
Soft brush optionalUse a soft brush only. A hard brush can cut the rubber.
The cleaner your manufacturer names materialRead the documentation for your model. The manufacturers do not agree.
Warm water materialGE Appliances tells you to remove the cleaner with warm water.

Prepare the washing machine and yourself

Estimated 3 min

NOTEDisconnect the electrical supply first. Then get the room ready for a chemical cleaner.
  1. Set the washing machine to OFF.
    <1m
WARNING

DISCONNECT THE WASHING MACHINE FROM THE ELECTRICAL SUPPLY BEFORE YOU CLEAN THE DOOR SEAL.
Contact with the supply can give you an electric shock.

  1. Disconnect the washing machine from the electrical supply.
    • Remove the plug from the wall outlet.
    <1m
  2. Remove all the clothes from the drum.
    <1m
  3. Open the door of the washing machine fully.
    <1m
WARNING

WEAR RUBBER GLOVES AND EYE PROTECTION BEFORE YOU USE A CLEANER.
Bleach on your skin or in your eyes can injure you.

  1. Wear rubber gloves.
    • Whirlpool, LG and the CDC each give rubber gloves for this work.
    <1m
  2. Wear eye protection.
    • The CDC also gives eye protection for this work.
    <1m
WARNING

OPEN A WINDOW BEFORE YOU USE A CLEANER IN THE ROOM.
The fumes from a cleaner can injure your lungs.

  1. Open a window in the room.
    • The CDC tells you to let fresh air into the room.
    <1m

Examine the door seal

Estimated 5 min to 8 min

NOTEObjects in the fold of the seal can cut a hand. Look before you touch.
  1. Look at the full circle of the door seal.
    • A flashlight makes the dark parts of the seal easier to see.
    <1m
  2. Move the edge of the seal away from the drum with your fingers.
    • The seal is flexible. You can move it with your fingers.
    • Do not use a tool on the seal. A tool can cause a tear.
    <1m
WARNING

LOOK INTO THE FOLD OF THE SEAL BEFORE YOU PUT YOUR HAND INTO IT.
Pins, broken glass and metal parts collect there. These objects can cut your hand.

  1. Look into the fold at the lowest point of the seal.
    • LG names the six o'clock position of the gasket as the place where objects collect.
    • Water also stays at this point after each program.
    1m
  2. Remove the objects from the fold of the seal.
    • Coins, buttons and hair grips collect in the fold.
    • Pins and broken glass also collect there.
    2m
  3. Examine the seal for a tear or a hole.
    • A tear in the seal lets water onto the floor.
    • Stop this procedure if the seal has a tear. Speak to an appliance technician.
    1m

Find the correct cleaner for your model

Estimated 6 min to 10 min

Door seal cleaner — chemical compatibility
Unverified — do not rely on this value
CONSULT THE MANUFACTURER DOCUMENTATION FOR YOUR MODEL BEFORE YOU PUT ANY CHEMICAL ON THE DOOR SEAL

No tier-1 source was found for this value. Take it from the documentation supplied with your equipment.

Four tier-1 manufacturer sources give four different answers for the same part, and two of them are in direct opposition. Whirlpool (whirlpool-frontload-door-seal, accessed 2026-07-29) says to mix 3/4 cup (177 mL) of liquid chlorine bleach with 1 gallon (3.8 L) of warm tap water, wipe the seal with it, and let it stand for 5 minutes. Bosch (bosch-washer-clean-seal, accessed 2026-07-29) says the opposite for its own machines: do not use cleaners that contain chlorine, because they may degrade the rubber seal over time; Bosch prescribes a soft damp cloth and nothing else. LG (lg-washer-door-gasket-mold, accessed 2026-07-29) prescribes a different chemistry altogether — 5 g of oxygen bleach in 5 L of warm water, which the page describes as a 1000-fold dilution and which is roughly fifty times weaker than the Whirlpool chlorine solution. GE Appliances (ge-frontload-washer-odor-tub, accessed 2026-07-29) permits mild detergent, diluted bleach or diluted vinegar without naming a concentration, and adds a step the other three do not: wipe all the cleaning solution away with warm water before the washer is used again. This page does not average these, does not rank them and does not choose between them. The seal on your machine is a specific rubber compound and only its maker knows what attacks it. Use the cleaner named in the documentation for your model, and use a damp cloth if it names none.
Door seal cleaning interval
Unverified — do not rely on this value
CONSULT THE MANUFACTURER DOCUMENTATION FOR THE INTERVAL

No tier-1 source was found for this value. Take it from the documentation supplied with your equipment.

NOTICE

READ THE DOCUMENTATION FOR YOUR MODEL BEFORE YOU PUT A CHEMICAL ON THE SEAL.
Bosch says that a cleaner with chlorine in it can cause damage to the rubber seal. Whirlpool gives a dilute solution of chlorine bleach for the same part.

  1. Read the care instructions in the documentation for your model.
    • The four manufacturers below do not agree about the correct cleaner.
    • The specifications on this page give the disagreement in full.
    3m
  2. Select the cleaner that your documentation names.
    • Bosch gives a damp cloth and no chemical at all.
    • Use a damp cloth if your documentation names no cleaner.
    1m
WARNING

USE ONE CLEANER ONLY.
The CDC says that you must never mix bleach with a different cleaner. A mixture of bleach and a different cleaner can make a toxic gas.

  1. Prepare the cleaner to the strength that your documentation gives.
    • Whirlpool gives 177 mL of liquid chlorine bleach in 3.8 L of warm water.
    • LG gives 5 g of oxygen bleach in 5 L of warm water.
    • These two quantities are not the same chemical and not the same strength.
    2m

Clean the door seal

Estimated 15 min to 18 min

  1. Put the cleaner on a soft cloth.
    <1m
NOTICE

DO NOT USE A HARD BRUSH OR AN ABRASIVE CLEANER ON THE SEAL.
Bosch says that an abrasive cleaner can cause damage to the rubber.

  1. Clean the top surface of the seal with the cloth.
    2m
  2. Clean the fold below the seal with the cloth.
    • Move the edge of the seal with your other hand as you clean.
    • The stains in this fold are the cause of the smell.
    4m
  3. Clean the glass of the door with the cloth.
    1m
  4. Let the cleaner stay on the seal for the time in your documentation.
    • Whirlpool gives 5 minutes for its dilute solution of chlorine bleach.
    • LG and Bosch give no time for this step.
    5m
  5. Remove the cleaner from the seal with a cloth and warm water.
    • GE Appliances tells you to remove all the cleaner with warm water.
    • A cleaner that stays on the seal can go onto the next load of clothes.
    3m

Dry the door seal

Estimated 4 min

  1. Dry the seal with a dry cloth.
    • Dry the fold below the seal also.
    2m
  2. Dry the glass of the door with the dry cloth.
    <1m
  3. Keep the door open until the seal is fully dry.
    • LG tells you to keep the door open until the gasket is completely dry.
    1m

After the job

Estimated 2 min

  1. Connect the washing machine to the electrical supply.
    <1m
  2. Set the washing machine to a rinse program.
    • A rinse program removes the last of the cleaner from the drum.
    <1m
  3. Start the program.
    <1m
  4. Keep the door open after each program from now.
    • LG says that moisture in a closed drum causes mold in the gasket.
    • Keep the detergent drawer open also.
    <1m
  5. Record the date.
    <1m

Terminology

This page uses one term for each item and holds it throughout, as ASD-STE100 requires. Equipment sellers and other guides use the names below for the same parts.

door seal
Also called: door gasket, gasket, bellows, boot, boot seal, diaphragm, rubber ring, rubber seal, the rubber bit round the door, washer seal
front-load washing machine
Also called: front loader, front-loading washer, washing machine, washer, front load washer, washer dryer combo
mold
Also called: mould, mildew, black mold, black speckles, black spots, slime, gunk
oxygen bleach
Also called: colour-safe bleach, color safe bleach, non-chlorine bleach, percarbonate, oxi cleaner

When to use a professional

Stop if the door seal has a tear, a hole or a cut. A seal with a tear lets water onto the floor. This procedure does not repair it. Speak to an appliance technician about a new seal.

Stop if the metal ring that holds the seal is out of its position. Do not pull the seal off the machine. The ring is under tension. The seal must be in one exact position on the machine.

Stop if the smell stays after two cleans and one hot program. The cause is then in the drum, the pump or the outlet hose. This procedure does not reach any of them.

Common questions

Can I use bleach on the rubber seal of my washing machine?

It depends entirely on who made your machine, and that is not a dodge. Whirlpool publishes a dilute chlorine bleach recipe for exactly this part: 3/4 cup in a gallon of warm water, left on for five minutes. Bosch publishes the opposite instruction for its own machines and says cleaners containing chlorine may degrade the rubber seal over time. LG sends you to oxygen bleach instead, at roughly a fiftieth of Whirlpool's strength. GE allows diluted bleach but tells you to rinse it off with warm water afterwards. Look up your own model before you reach for the bottle.

Why does my front loader smell even after a hot wash?

Because the smell is usually not in the drum. It is in the fold underneath the door seal, which holds a film of water, lint and detergent residue after every cycle and never gets hot enough or long enough to sterilise itself. A hot wash rinses the drum and leaves the fold untouched. Lift the edge of the seal and look: if it is grey, slimy or speckled black, you have found it.

What is the black stuff on the door gasket?

Mould and mildew growing on the film of detergent, fabric softener and body soil that collects in the wet fold. LG's own guidance is blunt about the cause: if you keep the door shut, the moisture cannot dry and mould forms inside the gasket. Heavy black staining that has been there for months often does not fully come out even after a correct clean, because the pigment has penetrated the rubber. The seal is still sound; it just looks bad.

How often should I clean the door seal?

LG is the only one of the four sources on this page that names an interval: at least once a month. Whirlpool and GE describe the job without giving a frequency, and Bosch treats it as ongoing care rather than a scheduled task. Monthly is a reasonable working answer, but check your own manual, and do it immediately if you can see staining or smell anything.

Can I use vinegar instead of bleach?

GE names diluted vinegar as one of three acceptable options for its gaskets. Bosch does not mention vinegar, but does warn that citric acid degrades the machine's rubber parts, which is a different acid and not the same claim — do not read it as permission or as prohibition. The one rule that applies to every machine comes from the CDC rather than a manufacturer: never mix bleach with any other cleaner. Vinegar and bleach together give off chlorine gas. Pick one product and rinse thoroughly before you go anywhere near a second.

Should I keep the washer door open all the time?

Yes, and it is the single change that keeps the seal clean. Leaving the door and the detergent drawer open lets the drum and the fold dry out between washes, which removes the standing moisture mould needs. LG says so directly. The only reason to close it is a household with small children or pets who might climb in, and in that case dry the seal by hand after each wash instead.

Sources

Every specification on this page is traced to one of these sources. Tier 1 is a manufacturer document, a published standard, or a government safety authority. See Standards for the full tiering rule.

  1. Tier 1Cleaning the Door Seal - Front Load WasherWhirlpool Corporation · accessed 2026-07-29 · re-verification due 2027-01-25
  2. Tier 1[LG front load washing machine gasket] There are stains and mold in the door gasket.LG Electronics U.S.A. · accessed 2026-07-29 · re-verification due 2027-01-25
  3. Tier 1How to clean your washer's rubber sealBSH Home Appliances (Bosch Home Appliances US) · accessed 2026-07-29 · re-verification due 2027-01-25
  4. Tier 1How to Clean the Rubber Parts of Your Washing MachineBSH Home Appliances (Bosch Home Appliances US) · accessed 2026-07-29 · re-verification due 2027-01-25
  5. Tier 1Front Load Washer - Odor in TubGE Appliances · accessed 2026-07-29 · re-verification due 2027-01-25
  6. Tier 1How to Safely Clean and Sanitize with BleachCenters for Disease Control and Prevention · accessed 2026-07-29 · re-verification due 2027-01-25

Revision history

Current version 1 · updated 2026-07-29 · next review due 2027-07-29

  1. v1 · 2026-07-29First draft. Sourced to Whirlpool, LG, Bosch and GE Appliances front-load door seal documentation, plus CDC guidance on safe bleach use. The cleaning agent publishes as consult-the-manufacturer with a four-way conflict note: Whirlpool prescribes dilute chlorine bleach for the seal and Bosch prohibits chlorine on the same part.

Corrections to this page are listed in the public corrections log. Reports that are credible and not yet verified are listed in the public errata register, and an open one renders above the step it concerns.

Comments and corrections

Found an error? A correction with a manufacturer source is applied and logged publicly. You can also write to corrections@fixchecklist.com.

Every step above carries its own report control, which tags the report with that step so a correction reaches the right place. For anything about the procedure as a whole — the order of the sections, a step that is missing, something that did not match your equipment — use this: report something about this whole procedure.

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