I Piss this game all the time.
I drink the largest soda the gas station has in Las Vegas and hold in my pee until I get to Eddie's to go for a high score. (Ghosty Brotato if you see me)
Yes touching the screen is dirty, but we are all washing our hands right after going to the bathroom, right? So I can tolerate the germs for a second or two.
They also have insanely good maintenance at Eddies, I wouldn't be surprised if that glass is getting wiped down every two hours.