Equipment must be CLEANED at least every 24 hours.
Calibrated
keep everything clean and sanitized
must decrease
Sanitizing is the process of reducing the number of microorganisms on a clean surface to safe levels. To be effective, cleaning and sanitizing must be a two-step process. Surfaces must first be cleaned and rinsed before being sanitized. (ServSafe Essentials section 11-21)
bacon
Cooler shelves
The baby bottle
G
Antonyms of Contaminated (depending upon use) could be Decontaminated, Sanitized, Sanitary, Pristine, Pure, Clean, Disinfected.
Washing you hand before touching clean appliances is the proper way of doing things. It will keep things more neat and sanitized.
They are synonyms and can be interchanged in many contexts. "Clean" is a very general word meaning "free from dirty, contamination, microbes, or neatly organized," etc. "Sanitary" means those things but specifically with a focus on promoting good health (e.g. avoiding disease, avoiding contamination, sterilization, etc.).