- Cleaning and disinfecting are different jobs: always clean first, then disinfect.
- Every disinfectant has a label contact time (from under a minute to about ten minutes); the surface must stay wet that long for the product to work.
- Map the high-touch points in your building and disinfect them on a set schedule.
Here's the mistake we see in buildings everywhere: a crew sprays disinfectant on a visibly dirty surface, wipes it once, and moves on. The surface looks clean. It isn't disinfected — and in a medical office, daycare, or any high-traffic facility, that gap matters.
The two jobs are different
Cleaning removes dirt, dust, and organic material from a surface using soap or detergent and physical action. It doesn't necessarily kill germs, but it removes a lot of them — and it clears the way for the second step.
Disinfecting uses a registered chemical to kill the germs that remain on a surface. It does almost nothing through a layer of grime, because organic material shields microbes and neutralizes many disinfectants on contact.
That's why the sequence is non-negotiable: clean first, then disinfect. A disinfectant applied to a dirty surface is mostly theater.
Contact time: the step everyone skips
Every disinfectant label lists a contact time (sometimes called dwell time) — the number of minutes the surface must stay visibly wet with the product for it to do its job. Depending on the product and the pathogen, that can range from under a minute to ten minutes.
Spray-and-immediately-wipe defeats the product. If a surface dries or is wiped before the listed contact time, the kill claim on the label no longer applies. Practical fixes:
- Work in a sequence: apply disinfectant to several surfaces, then circle back to wipe in the same order.
- Choose products whose contact time fits your workflow — a one-minute product that gets its full minute beats a ten-minute product that gets thirty seconds.
- Train crews to read the label, not guess. Contact time is product-specific.
Map your high-touch points
Disinfecting everything daily is neither realistic nor necessary in most facilities. Disinfecting the right things daily is. Walk your building once and list every surface touched by many hands:
- Door handles, push plates, and crash bars — every door, both sides
- Light switches and switch plates
- Elevator buttons, inside and out
- Handrails on every stair run
- Restroom: flush handles, faucet handles, stall latches, dispenser levers
- Break room: fridge and microwave handles, coffee machine buttons, faucets
- Shared equipment: copier touchscreens, conference phones, supply room knobs
- Reception counter and sign-in surfaces
That list becomes a route. A crew that walks the same high-touch route every visit covers in minutes what random wiping never reliably covers.
A note on safety
Stronger isn't better. Disinfectants are regulated pesticides, and overuse creates its own problems — surface damage, air quality complaints, and chemical exposure for occupants and crews. Choose EPA-registered products appropriate for the setting, never mix chemicals (bleach plus ammonia is genuinely dangerous), keep safety data sheets accessible, and ventilate while working. In occupied buildings, products certified by Green Seal or EPA Safer Choice reduce risk without sacrificing results when used correctly.