If you don't like horror stories, don't read this. There are mites living on your face. Don't try to wash them off. You can't, the mites will still be there. They belong to the genus Demodex, along with a lot of other mites that spend their entire lives in and around the pores of mammals.
So what are these weird little things doing on your face? Minding their own business is what - just crawling around, eating, and having sex on your face. Oh, also, they're laying eggs in your pores.