I don't sterilize or santize my metal tools. I disinfect them (which is WAY different that simple sanitizing.) in a hospital grade disinfectant, full immersion, for a minimum of ten minutes. That happens after I scrub them with soap and water (sanitizing).
There is a foot doctor in the US who is pushing for every state to require salons to sterilize metal implements in order to reduce the incidence of bacterial, viral, and fungal infections that seem to be popping up all over (mostly from NSS). But sterilization wouldn't be necessary if nail techs understood the differences between sanitizing, disinfecting, and sterilizing--and put those practices to proper use!
What has your nail school taught you about the difference between sterilization, disinfection, and sanitizing?