> It's more than just procedure or habit, your hands feel dirty and you want to wash that off.

I'm not sure that's reliable across people. I'm definitely like that; whenever my hands feel the least bit dirty or oily or anything, I really want to wash them. But I've run into people who have commented on the fact that I do that, and I've learned that there are lots of people who just don't have that compulsion at all.

I agree that it's not reliable.

My point is that changing gloves is something that is even less reliable and needs to be drilled in through procedure and habit. Handwashing also needs the procedure and habit, but it has the added benefit that for a good number of people there's also a physical compulsion that goes along with that procedure and habit.