A little bit of urine won't hurt your snake. In a day or two you can wipe him off with a damp cloth if you're stressing over it, but your snake won't care either way.
Just dont kiss your snake anytime soon if your planning to leave the pee on him
A weird thought past through my mind. Just thinking if the Police Raided my home, they'd see a 14ft retic slithering around, a large redtailboa, a large Ball python who acts like a lap cat, and a corn snake who thinks he can make a nest out of my hair... and if they went inside my garage and checked inside my freezer... they'd find dead bodies.
it was a really really faint yellow so if it was on a paper towel it would probably look clear. but since its a paper towel you could just put new paper towels down anyway.