identify the problem, or the toilet continues running, have the mechanism inspected.
Fixing the actual cause is far more effective than trying an unproven internet trick.
4. Does Aluminum Foil Clean the Toilet Bowl Automatically?
This is another appealing promise: put foil in the tank, flush as usual, and let the toilet clean itself.
Unfortunately, there is no good evidence that a ball of aluminum foil releases a cleaning agent or removes ordinary bowl stains simply by sitting in the tank.
Toilet stains may come from mineral deposits, hard water,
