I had a horrible experience with weed 3 years ago and it led to depersonilization for over a year and it was the scariest experience of my life! I finally stopped thinking about it and it slowly starred fading away. But now, my little brother is 17 and he smokes weed out with his friends, and he comes home and doesn't wash his hands or anything, so he touches everything with weed still on his hands! And I'm worried that if I touch what he touched, then I might ingest little specks of weed accidentally! I am washing my hands constantly and they are getting really dry.  I can't keep living like this, not being able to touch anything because he touched weed and then touched whatever it is! What do I do? I'm just scared I will get high without wanting to...please help....??