I've use crystal off/on for years. Sometimes, especially about 15 years ago when I first used it, I broke out pretty badly. My only suggestion is to make sure you rinse your ticklepits (my daughter used to call them that) really well to make sure there isn't any soap residue. Also, make sure you're not on your cycle, as hormones and changes can affect anything and everything. Use it for 3 weeks, consistently, because that's a good detox time for anything to come full circle. I have been using it pretty faithfully for the last couple of years, with no issues. Even after moving from DRY to HUMID states, it has stayed reliable for me. My hubby forgot is deo on a trip once this spring, and was forced to use my crystal rock, and KNEW he was gonna be funked out. Well, it worked for him, and he had to eat crow! Unfortunately, he hasn't given faith to it or used it again, but at least he knows, even if he makes a bad choice.