Sanitation, Sterilization, and Safety: Sequences and Contact Times
Sanitation questions are the highest-yield items on this exam and are almost always sequenced: what you do first, next, and for how long. Learn the three levels of decontamination and the contact-time rule, and most items become automatic.
The three levels
- Cleaning - soap or detergent plus water and friction removes visible debris. It always comes first; disinfectant cannot penetrate residue.
- Disinfection - an EPA-registered, hospital-grade, tuberculocidal disinfectant at label dilution for the full label contact time (commonly 10 minutes) kills most bacteria, fungi and viruses on nonporous items.
- Sterilization - destroys all microorganisms including spores. An autoclave runs about 15–20 minutes at 121 °C (250 °F) and 15 psi; dry heat is roughly 340 °F for an hour. Sterilization is optional for most nail implements; disinfection is mandatory.
Porous versus nonporous
- Single-use and discard: files, buffers, wooden pushers, cotton, pumice, toe separators, and any item that cannot be fully immersed.
- Clean, disinfect, then store covered: nippers, metal pushers, tweezers, reusable bits, metal files.
Surfaces and equipment
- Pedicure basin: scrub with soap and a dedicated brush, rinse, then fill with disinfectant at label strength for the contact time, drain, and let dry.
- Wipe chairs, lamps, trays and work surfaces between clients; keep disinfectant covered and change it per the label (often daily), checking strength with test strips.
- Wash hands before and after every client; wear gloves for blood or non-intact skin; no food, drink or smoking in the service area.
Worked example
A cuticle nipper slips and draws blood. Reasoning in order: stop the service, glove, apply antiseptic and a bandage; place the nipper in a labeled container; remove all visible blood, scrub with soap and water and a brush, dry; fully immerse in EPA-registered hospital-grade disinfectant for the label contact time; rinse, dry, and store in a closed container. Skipping the scrub or shortening the soak are the two classic failures.
Traps that cost marks
- Calling a UV cabinet or a jar of blue liquid a 'sterilizer'.
- Topping off old disinfectant with new, or soaking for less than the label time.
- Forgetting the basin, the brush, or the disinfectant container itself.
- Using hand sanitizer instead of soap and water when hands are visibly soiled.