It can. They recommend not wearing your favorite clothes. And wearing something you might not care about if it does stain. You can read all about it on the website and they go over it with you there also.
To save any heartache, wear clothes you want ruined. Don't forget your shoes too or maybe do it in socks :)
I wore black jeans. It washed out. I wouldn't wear you favorite white shirt. :o)
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