Let's be honest here I am surprised this doesnt happen more often. There are some nasty guys in this hobby that refuse the shower. And there are some I hear that do this because they don't like it or for cultural reasons or they simply don't want to go home smelling like soap.
Then they
cover the face pad with that thin paper really that isn't going to help much if a previous customer has some skin trouble or virus. They need to scrub those between clients with alcohol in front of you so you know. Same with the
table shower and the common use scrubby. Never use the same scrubby they use on everyone. Wash cloth only for me and no bars of soap. Soft soap only.
Don't just worry about stds there are nasty skin conditions you want no part of trust me. Working in It for years I can remember a time we were replacing some pcs in the lab ( they draw blood and urine samples) and I always glove up working in there even though they have plastic wash guards on the keyboards. My buddy didn't and later
he touched his face for some reason the next day
he had a rash. In 2 days it covered his face and spots of his body and 2 weeks to clear.
Labs look clean and sterile and have strict protocols
he touched a tainted keyboad with a wash guard. We lay in a just tidy massage room frequently visited by dirty and often nasty dudes. I think I may start cleaning it myself.