We bought this faucet 5 years ago. It has leaked 3x (every time after the first year it was installed/fixed). We called Kohler and they sent the replacement parts for free. We JUST realized what the true problem was. When assembling the o-rings, bearings, and valve, do NOT use Teflon, plumbers putty, or sealant/lubricant containing petroleum. You MUST use a lubricant sealant (petroleum free of course) all over the o-rings, bearings, and the orange gasket at the bottom of the valve. We applied the lubricant seal excessively and have NOT had a problem since. We are now on our 2nd year leak free! FYI- all the previous years that we replaced the parts, we couldn't see any problem with the parts either.We are now on our 3rd year leak free!