Hello, i recently stopped smoking a vape device with nicotine salts. my question is, because i am having a baby, do i have to go back and clean everything i have touched? before the baby, i wouldnt wash hands after i smoked?

It is a good idea to do that. Good luck.

Good cleaning in general is a good idea when you are anticipating a new baby in the house. That said, I see little way the traces of nicotine could reach/enter that baby from random objects it the environment. Good handwashing prior to working with baby should be adequate to remove any trace on your fingers.