How do you get rid of semen?

After giving a hand job and blow job I get some semen on my face and hands. How do you fully remove semen from you to keep yourself safe?

I have a crazy imagination haha like for example right after giving him a bj and hand job I would take a bath right after. What do I need to do to fully get rid of all the semen before I get into the tub? Because I’m thinking that if I get into the tub with semen on my hands and face, the sperm would swim into the tub and into my vagina haha.