Invisible stains
I have been dealing with fear of body fluids (mine or others) and especially with ones you can't fully see. I touched my dirty laundry ones and opened the door. Before I could wipe whatever is on the door, my mother unfortunately got to me first.
Left me with sheer anxiety- knowing what I touched despite spraying my hands off beforehand.
Some person once suggested to do the whole "if I don't see it" method where I just shrug it off since it's not even visible to me or anyone.