Bottom Line: Skip the Foil and Fix the Real Problem
Aluminum foil has plenty of useful jobs around the house, from wrapping leftovers to helping with certain cleaning tasks. But putting a ball of it in your toilet tank is not a proven shortcut to a cleaner bowl, fewer leaks, rust prevention, or lower water bills.
The trick may look convincing in a short video, but there is no good evidence that it delivers the promised results. At best, the foil sits in the tank without doing anything useful. At
