It sounds like a miracle meal machine: You dump in your ingredients, plug the thing in, and get a hot, hearty, perfectly cooked meal ready to eat—with next-to-no prep or cleanup time. With recipes for everything from breakfast to drinks (and dessert!), it’s easy to go a little crockpot crazy. But alas, not every food is suited for slow cooking. Even Stephanie O’Dea, author of the New York Times best-selling author of the Make it Fast, Cook it Slow cookbooks, who once used her slow cooker every day for an entire year, admits to having her share of flops. Here are 13 foods to avoid when using your slow cooker.