My toilet seat had been sliding for weeks. Every time I sat down, it shifted. I kept thinking I'd get around to fixing it, but it seemed like one of those mysterious plumbing problems that required calling a professional.
Then I realized it was probably just loose bolts. Turns out I was right. Five minutes with a screwdriver and my toilet seat was completely stable again. If yours is sliding around, you can fix it the same way. Here's what's happening and how to solve it.