Every once in a while, I'll record a shower video to list for sale, and like you I make sure that my cam and laptop are far away. The cam and laptop are closer to my bathroom door than they are to the bathtub. If there's also whipped cream and chocolate syrup involved, that messy stuff is nowhere near my cam and laptop. I've already washed it all off and dried myself off by the time I walk back over to my laptop.
Same thing if I were to do a baby oil show. I'd be very careful to not be dripping oil all over my laptop. The baby oil thing I'd be more likely to screw up than the shower, because I'm still close to my laptop when I'm applying the baby oil. I'd just have to be super careful. I hardly ever use baby oil though. If I do use it, it's probably while I'm in a private show, and I'm running out of ideas of what to do next because the guy isn't saying anything about what he wants. Lol.