Spot A Toilet Leak Using Kool Aid
While we hate to waste a good pack of Kool Aid, this sweet powdered drink can be used for something other than quenching your thirst on a hot summer day. Remove the lid to the tank of your toilet and pour in a dark colored Kool Aid packet.
DO NOT FLUSH THE TOLIET, instead let the water sit in the tank for 30 min to see if any of the colored water shows up in the bowl. If it does, you have a leak and might need to replace the flapper.