Quick Summary
- Monthly routine: Hot cycle with 2 cups white vinegar, then baking soda rinse
- Front-load priority: Clean the door gasket every 2 weeks to prevent mould
- Best products: White vinegar, baking soda, or Affresh/Tide cleaner tablets
- Time required: 30–45 minutes hands-on + 1–2 machine cycles
- After every wash: Leave the door open to allow the drum to dry
A dirty washing machine is one of the most overlooked causes of poor laundry results. Detergent residue, mineral deposits from hard water, and trapped moisture create the perfect environment for mould and mildew — leaving your clothes smelling musty even after a full wash cycle. The good news: a thorough cleaning takes less than an hour and requires nothing more than white vinegar, baking soda, and a microfibre cloth.
This guide covers both front-load and top-load washers, with a step-by-step deep clean, a monthly maintenance routine, and the signs that your machine needs professional attention rather than just a scrub.
What You'll Need
- White distilled vinegar (2 cups)
- Baking soda (½ cup)
- Washing machine cleaner tablets — Affresh or Tide (optional but effective for hard water)
- Microfibre cloths (2–3)
- Old toothbrush
- Spray bottle
- Mild all-purpose cleaner (for exterior)
Step-by-Step: How to Deep Clean a Washing Machine
Run a hot drum cycle with white vinegar
Pour 2 cups of white distilled vinegar directly into the drum (not the detergent dispenser). Select the hottest water temperature and the largest load size, then start the cycle. The heat activates the vinegar to dissolve mineral deposits, soap scum, and mould spores throughout the drum and internal hoses. Top-load only: pause the machine after it fills and let it soak for 30 minutes before resuming.
Scrub the door gasket — front-load washers only
The rubber gasket (door seal) on front-load washers is the primary breeding ground for black mould. Pull the gasket back gently all the way around and inspect for trapped lint, hair, and dark spots. Mix equal parts white vinegar and water in a spray bottle, spray the gasket, and scrub with an old toothbrush. Pay extra attention to any black or pink discolouration. Wipe dry with a microfibre cloth. Repeat this step every 2 weeks even if you do a full deep clean monthly.
Clean the detergent and fabric softener dispenser
Most dispenser drawers slide straight out with a press of a release tab inside the drawer. Soak the entire drawer in a sink of warm soapy water for 10 minutes to soften caked detergent. Scrub all compartments with the toothbrush, rinse under running water until clear, and dry before reinserting. Also reach into the dispenser cavity in the machine with a damp cloth and wipe down the interior.
Run a baking soda rinse cycle
Once the vinegar cycle is complete, sprinkle half a cup of baking soda directly into the empty drum. Run another hot, large-load cycle. Baking soda neutralises the vinegar smell, softens any remaining residue, and helps deodorise the drum lining. This two-step combination — vinegar first, then baking soda — is more effective than either product used alone.
Clean the pump filter — front-load washers only
Most front-load washers have a coin/lint filter located behind a small access panel at the bottom front of the machine. Place a towel on the floor and have a shallow dish ready. Slowly unscrew the filter cap to let water drain out gradually. Remove the filter, remove any trapped lint, coins, or debris, rinse under running water, and screw it back in firmly. This filter should be cleaned every 1–3 months.
Wipe the exterior and control panel
Dampen a microfibre cloth with an all-purpose cleaner. Wipe the lid or door (inside and out), the top surface, sides, and control panel. Avoid spraying cleaner directly onto digital controls — spray the cloth instead. For stainless steel fronts, wipe in the direction of the grain to avoid scratching.
Leave the door or lid open to dry
After every wash — and especially after cleaning — leave the washer door or lid open a few inches. This is the single most effective way to prevent mould and mildew regrowth. Most odour problems in front-load washers are caused entirely by closing the door right after use, trapping warm moisture inside.
Front-Load vs Top-Load: Key Differences
Front-Load Washers
- Door gasket needs cleaning every 2 weeks
- Pump filter at bottom front — clean every 1–3 months
- More prone to mould due to sealed drum design
- Always leave door open several inches after use
- Use only HE (high-efficiency) detergent
Top-Load Washers
- Easier to clean — drum is open to air
- No gasket to scrub, but wipe the drum rim and lid
- Soak step during hot cycle is especially effective
- Clean the agitator (if present) with a vinegar-soaked cloth
- Check under the agitator cap for hidden lint buildup
Monthly vs Deep Clean: What to Do When
Monthly Maintenance Checklist
Quarterly Deep Clean (Every 3 Months)
Pro tip — hard water: Toronto and GTA tap water is moderately hard, which accelerates mineral buildup inside your washer. If you notice white chalky residue on the drum interior or clothes feel stiff, increase cleaning frequency to every 2 weeks and consider a water softener additive in your regular detergent.
Best Products to Use
White distilled vinegar is the most versatile and affordable choice. It dissolves mineral deposits, kills most mould species, and deodorises effectively. Use 5% acidity white vinegar — not cleaning vinegar (10% acidity), which can damage rubber seals over time.
Baking soda works as a natural deodoriser and mild abrasive. Combined with vinegar in a two-step routine, it cleans more effectively than either product alone. Never mix them together in the same cycle — they neutralise each other in solution.
Commercial washer cleaner tablets (Affresh, Tide Washing Machine Cleaner) are formulated to break down detergent residue and biofilm that home remedies can miss. They are especially effective for hard-water areas and are safe for all washer types including HE machines. Use one tablet per month if you have high water hardness.
Avoid these: Do not use dish soap — it creates excessive suds that can overflow and damage the pump. Do not use undiluted bleach on rubber gaskets regularly — it degrades the rubber over time. Never use abrasive scrubbing pads on the drum interior.
Signs Your Washer Needs Professional Service
Regular cleaning resolves most washer odour and residue problems. However, some issues require a certified technician:
- Persistent mould smell after 2–3 deep cleaning cycles — mould may have penetrated the drum baffles or hoses
- Water not draining from the drum after the cycle — blocked drain pump or clogged drain hose
- Clothes still dirty or soapy after a full wash — could be a water inlet valve problem or drum rotation issue
- Excessive vibration or banging — worn drum bearings or out-of-balance load suspension
- Error codes on the display — electronic control board or sensor fault
- Water leaking from the bottom or door — damaged gasket, hose, or pump seal
If you are experiencing any of these issues, our washing machine repair service covers all major brands across the GTA. We charge an $89 diagnostic fee, waived when you proceed with repair.
Frequently Asked Questions
Clean your washing machine at least once a month. If you do more than 5 loads per week, have hard water, or use liquid fabric softener regularly, clean it every 2 to 3 weeks. A quick monthly hot vinegar cycle takes under an hour and prevents most odour and mould issues.
Washer odour is almost always caused by mould and mildew growing in the drum, door gasket, or detergent dispenser. Front-load washers are especially prone to this because the rubber gasket traps moisture. The fix is a deep clean with vinegar and baking soda plus leaving the door open after every wash.
Yes, you can use half a cup of chlorine bleach in the drum on a hot cycle. However, never mix bleach with vinegar — this creates toxic chlorine gas. Run a plain water rinse cycle after bleach to clear any residue before doing laundry.
White distilled vinegar and baking soda are the most effective and affordable options for regular maintenance. Commercial washer cleaner tablets like Affresh or Tide Washing Machine Cleaner work well for deep cleaning and are especially useful if you have hard water mineral buildup.
Residue on clothes usually means you are using too much detergent, the dispenser is clogged, or there is soap scum buildup inside the drum. Run a hot empty cycle with no detergent or use a commercial cleaner tablet. If the problem persists, the machine may need professional service.
For high-efficiency top-loaders without an agitator: pour 2 cups of white vinegar directly into the drum, run the hottest large cycle, pause for a 30-minute soak, then complete the cycle. Follow up with a half-cup of baking soda and another hot cycle. Wipe the rim and lid seal with a vinegar-dampened cloth.
Call a certified technician if your washer still smells after repeated cleaning, is vibrating excessively, leaving water in the drum, producing error codes, or making grinding or banging noises. These are signs of mechanical or drainage issues that cleaning alone cannot fix.