I do the same thing after I eat. For me, It's just greasy and oily substances. I'm completely fine with dirt or anything like it, it's just oily and oleaginous foods.

I'm thinking maybe it's contact OCD? It sounds exactly like what happens to me, so perhaps you should check it out too!

I'm the same way! I can't stand lotion when it doesn't dry right away, I absolutely hate the way it feels on my hands when I try to do stuff so I just wash it off because it feels "oily".

I'm the exact same way! Especially with my hair, I cannot STAND greasy hair at all. I'm also the same way with skincare, the sides of my nose get oily and I absolutely despise it because I can't stop thinking about it, But when I'm in the shower I usually wash my face with bar soap + skincare after shower and it usually takes it away.