If you've ever watched a cleaning team at work and noticed they're using different-coloured cloths in different rooms, that's not random — it's a recognised hygiene standard, and it's worth knowing what it means, because it's one of the easiest things to ask any cleaning company about to gauge how seriously they take cross-contamination.
The basic system
General areas: desks, offices, communal spaces. Low risk, high volume.
Kitchens and food-prep areas, kept strictly separate from anything used in a washroom.
Washrooms and toilets — the highest-risk area, and never used anywhere else.
Sinks, basins and other washroom surfaces that aren't the toilet itself.
Why it actually matters
The point is simple: a cloth that's touched a toilet should never touch a kitchen worktop, even accidentally, even once. Without a colour system, that separation relies entirely on someone remembering which cloth is which — easy to get wrong on a long shift, especially with agency or temporary staff who don't know a building's usual routine. Colour-coding takes the memory problem out of it. Anyone on the team, on any visit, can see at a glance whether a cloth belongs in this room or not.
It's not about looking professional — it's a physical barrier against germs moving from a washroom to a kitchen.
What to ask a cleaning company
If you're evaluating a cleaning contractor, this is a fair, specific question to ask: do you colour-code, and how do you train new starters on it? A company that can answer confidently and specifically is one that treats hygiene as a system, not a habit that depends on whoever's on shift that day. It's a small detail, but it's a genuinely good signal for how the rest of the job is run.
How we handle it
Every cleaner on our team works to this same colour system regardless of which building they're on, and it's part of how we train anyone new before their first solo shift. It's a small, unglamorous piece of the job — which is exactly why it's worth getting right.