Have your ever read a crazy makeup tip in a magazine or gotten beauty advice from a friend that’s just plain bizarre? We love trying out quirky beauty tips and new products, but there are some things that should be banned from the beauty world forever. That DIY mayonnaise hair mask you saw on Pinterest? Yeah, that’s not a good idea. After searching the web and talking to our Facebook readers, we’ve decided to make a guide on the worst beauty advice ever. Unfortunately, we have discovered how horrible this advice is by trial and error. Check out the slideshow above for 11 tips you should just never try. And if you’ve got any other whacky suggestions, we’d love to hear from you.