I totally understand you! There was a time when I bumped my leg in a bottle of an insect killer. I know it's closed but I'm starting to think it's in my skin so I washed it many times and I wore a jogging pants so that it won't get anywhere but I'm still afraid that I'll harm my family with the insect killer on my leg (It's really hard to explain). It was really exhausting.
I think we are on the same page, I totally understand what you was going through.