Ah, Reddit. It’s one of our favorite places to get lost on the Internet. No matter what we’re searching for — or happen to randomly stumble upon — there’s always something totally fascinating (hello, dislodged microbead) and straight-up strange (like these questionable makeup hacks) to discover. Take, for instance, our latest find: a subReddit thread filled with wacky, weird, and slightly disturbing skin-care tricks and tips.

But because there were so problematic hacks that left us looking more like the hand on the chin emoji, we phoned a friend. Well, not so much a “friend” as an actual expert in the field. Joshua Zeichner, director of cosmetic and clinical research in dermatology at Mount Sinai Hospital in New York City, have us some helpful insight for a little DIY-debunking backup. Here, he breaks down the top six controversial tips from Reddit users.