I found a helpful topic on the forum directing me to the manufacturer’s instructions and have succesfully replace the cartridge (MOEN 1225) on my tub/shower single handle, but the faucet is still dripping. Where else should I look? I suspect this is leading to larger gas bills as the dripping water is warm even when closed handle is turned to cold position. This leads me to believe that the cartridge was not bad in the first place. Hmmm?