foil is easy to reach, remove it carefully without forcing or bending any components. If pieces have disappeared, the toilet starts running, or flushing changes, inspect the tank and seek plumbing help if needed.
Can I put baking soda or vinegar in the tank instead?
Don’t assume that a household ingredient is suitable simply because it is commonly used for cleaning. Some products or chemical combinations may damage tank components or finishes. Follow your toilet manufacturer’s instructions and use cleaning products specifically intended for the relevant surface or task.
