Sanitation, Disinfection, Safety, and Infection Control
Three levels, three outcomes
Cleaning removes visible debris with soap and water but kills nothing reliably. Disinfection destroys most pathogens on nonporous surfaces using an EPA-registered, hospital-grade, tuberculocidal disinfectant. Sterilization destroys all microbial life and is done by autoclave - it is not something a barber performs on combs between clients. Exam questions routinely offer "sterilize combs in disinfectant" as a distractor; the correct category is disinfection.
Applying it to the shop
Nonporous implements (metal shears, clippers with the blade removed, combs, handles) are cleaned, then fully immersed in disinfectant for the manufacturer's stated contact time. Electrical equipment that cannot be immersed is cleaned and wiped with an EPA-registered disinfectant wipe or spray approved for that use. Porous items - wooden combs, emery boards, natural-bristle items that cannot be disinfected - are single-use and discarded. Towels and capes are laundered with detergent and bleach or used once and discarded. Disinfectant solution is mixed to the label dilution, kept in a labeled, covered container, and changed when cloudy or per manufacturer direction; UV cabinets are storage, not disinfection.
Blood and infection control
For a nick: stop the service, glove up, apply an antiseptic and a bandage, then clean and disinfect everything contacted. Spills are absorbed with disposable towels, double-bagged, and the area disinfected. Handwashing with soap and water before and after each client is the single most effective control; hand sanitizer is an adjunct, not a substitute.
Traps
Questions blur sanitation (the whole condition of the shop) with disinfection (the chemical step), or claim a disinfectant works instantly. Contact time is always the manufacturer's, never "a quick dip."