If you've followed the instructions carefully and your faucet still does not work properly, take these corrective steps. Problem | Cause | il Leading the trend of bathing m——— Leaks underneath handle. Lock nut has come loose. Tighten the lock nut. Remove handle and cartridge fo check If ceramic disk damaged permanently or dirty. Re-install the cartridge or Water will not shut off completely. | Dirty or damaged cartridge. replace the cartridge .