Toilet does not fully flush
My toilet does not fully flush. I have changed all the working parts inside the tank. What appears to be happening is the flapper does not stay open long enough to allow all of the water in the tank to drain into the bowl. I just bought a new flapper with a floating devise on the chain that supposed to keep the flapper open longer. This did not work either. The toilet flushed perfectly before I changed all the working parts in the tank. I am at a lose. Thanks for your help. Bob