I agree, it completely floors me that guys can't muster the consideration to wash properly or just don't know how.
Jenny mentioned some girls having the washing instructions posted in the bathroom. The first, and only, time I had ever come across this was in Dublin. It was an actual mood killer to see such a thing taped to the mirror and glass facing into the shower. It was a bit depressing to be faced with the evidence that enough clients don't respect the profession that such common courtesies needed to be requested by the providers. 🤦