I have hard water and hot water faucet valve was getting extremely hard to twist. Someone suggested spraying it with WD40. I did and it's now twisting smoothly and easily, but the faucet started to drip quite a bit. It's been a while now and it won't stop. (Originally I was hoping the WD40 would wash away and the drip would stop). What are my options at this stage? FYI : The faucet is a discontinued Kohler Cirrus model that I inherited from prior owners.