Nobody wants to open a washing machine and get hit with that musty smell. But in commercial laundry operations, mould isn't just unpleasant, it's expensive. It drives customers away, damages your equipment and leads to costly repairs you didn't budget for.
Here's the thing though: preventing mould doesn't need to be complicated. You don't need fancy chemicals or hours of scrubbing. Just a few smart habits and you'll keep your machines fresh, your customers happy and your equipment running smoothly for years.
Why Mould Loves Your Washing Machines
Think about what happens after every wash cycle. Your machine is warm, damp and often has bits of detergent stuck around the seals and dispensers. That's basically a five star hotel for mould spores.
Commercial machines have it even worse because they barely get a break. One load finishes, another goes straight in. There's no time for things to dry out properly between cycles.
Front loaders are the worst offenders. That rubber seal around the door? It's brilliant at keeping water in during the wash, but it also traps moisture in all those folds and creases afterward. Water sits there in the dark, warm folds and mould moves right in.
The Daily Habits That Actually Work
Forget complicated cleaning schedules. The best prevention comes from tiny habits that take seconds but make all the difference.
Leave Those Doors Open
Seriously, this one thing stops so much mould. When a machine finishes, prop that door open. Let the air circulate and the moisture evaporate. It feels almost too simple to work, but it's genuinely one of the most effective things you can do.
For launderettes, a simple sign reminding customers to leave doors ajar works wonders.
Get Wet Loads Out Fast
Damp clothes sitting in a drum pump humidity into every corner of the machine. Even half an hour is enough to create problems. Train your staff to shift loads quickly, or if customers operate the machines, those cycle complete beeps actually serve a purpose.
Use Your Spin Cycle Properly
The faster your spin, the more water gets flung out of the clothes. That means less moisture left behind in the drum. Most commercial Miele washers let you adjust spin speeds, so crank it up to the highest setting your fabrics can handle.
Don't Forget The Dryers
If moisture seems to hang around after loads, run your dryers empty on a warm setting for a bit. Gets rid of any lingering dampness that might be adding to your laundry room's humidity.
Hot Cycles Are Your Friend
Once a week, run each machine empty on the hottest programme it's got. The heat kills off any early mould growth and dissolves the gunky buildup where spores like to settle.
Just make sure the programme and any fabrics you're washing can actually handle high temperatures. No point ruining clothes to prevent mould.
When To Call In The Experts
Sometimes, despite everything, mould gets a foothold. Here's when you need professional help rather than another bottle of cleaner.
- That smell won't shift
If the musty odour hangs around even after thorough cleaning, mould's probably hiding somewhere you can't reach. Behind the drum, in the pipes, deep in the gasket folds. - You can see black spots
Visible mould on seals, in dispensers or on the drum means it's established. At that point, surface cleaning won't cut it. - Multiple machines acting up
When several machines develop issues at once, that's usually an environmental problem. Your whole laundry room might need looking at, not just individual machines. - Limescale won't budge
Stubborn mineral deposits that resist normal descaling need professional treatment. Left alone, they'll corrode components and cost you serious money.
How Often Should You Service?
As a rough guide, most commercial operations benefit from professional servicing at least once a year. High volume sites or anywhere with hard water might want to bump that up to twice yearly.
But honestly, it depends on your usage, your water quality and what hygiene standards you need to meet. Your servicer can advise based on your specific situation.
Regular servicing genuinely extends equipment life. Skip the servicing and you'll be replacing machines far sooner than necessary.
Getting Detergent Right Matters More Than You Think
Here's something that surprises people: excess detergent is one of the biggest causes of mould in washing machines.
More detergent doesn't mean cleaner clothes. It means more sticky residue coating your drum and dispensers. That residue? Mould absolutely loves it.
Why You Need HE Detergent
High efficiency detergents are made for modern washers. They produce fewer suds and rinse away cleanly. Regular detergent or overdosing HE products leaves film behind that attracts mould spores.
In commercial settings, overdosing is incredibly common. Customers think more product equals better results, which just isn't true.
Automatic Dosing Solves This
Stellisons Commercial supplies automatic dosing systems that measure exact amounts for each load. No guesswork, no waste, no overdosing.
Beyond preventing mould, you'll save money on detergent costs, get consistent cleaning results every time and simplify operations massively.
Ditch The Fabric Softener
Liquid fabric softeners leave waxy buildup that's even worse than detergent residue. It attracts moisture and gives mould the perfect surface to cling to.
Many commercial facilities just remove the softener dispensers entirely. Wool dryer balls or dryer sheets soften clothes without coating your machines in gunk.
Quick Daily Cleaning That Takes Minutes
You don't need marathon cleaning sessions. Just quick, consistent attention to problem spots.
Daily Wipe Downs
After busy periods, give the gaskets, door seals and detergent dispensers a quick wipe with diluted white vinegar or a mild commercial cleaner. Focus on:
- The inner folds of front loader doors where water pools
- Detergent dispenser trays that stay damp
- Drum areas near the door where moisture lingers
Takes two to three minutes per machine. That small investment prevents hours of intensive cleaning later.
Monthly Descaling
Once a month, run a hot cycle with an empty drum. Check your machine manufacturer's guidance on descaling products. Some commercial descalers are made specifically for laundry equipment and shift mineral deposits and detergent scum beautifully.
Hard water areas really need this. Those mineral deposits build up fast and accelerate both mould growth and equipment wear.
Want the complete picture? This article covers the basics, but the full guide goes deeper. Learn how to set clear operational standards, manage lint properly, control humidity and airflow, and understand when professional maintenance is worth it. Read the full guide to protect your commercial laundry equipment from mould and mildew.
Keep Your Equipment Running Perfectly
Preventing mould really does come down to controlling moisture, using the right amount of detergent and sticking to consistent cleaning routines. Nothing complicated, nothing expensive, just smart habits.
At Stellisons Commercial, we're a Miele Professional Approved Partner serving Essex, Suffolk and Kent. We supply commercial washing machines from 5.5kg to 32kg capacity, commercial tumble dryers, detergents and automatic dosing systems that take the guesswork out of every wash.
Our maintenance contracts give you complete peace of mind: emergency callouts, breakdown cover, preventive maintenance, compliance inspections. All with transparent fixed costs and zero hidden charges.
Looking to upgrade your equipment or set up a proper maintenance programme? Our team knows commercial laundry inside out and we're ready to help.
Call us on 01268 638060 to discuss what your facility needs.
