You've probably heard it all before, but it's true. Don’t dump anything in the toilet that doesn't belong. Avoid flushing feminine hygiene products, cotton swabs, paper towels, makeup-removal wipes, or “flushable” cat litter clumps. These products aren't designed to break down in liquid, so flushing them can increase your risk of clogging the pipes. Use your commode only for its intended purpose to prevent trouble.