Not sure what the issue is or if we got a faulty piece, but about 6 weeks after install, it started to stink like mildew. We contacted Kohler and they walked us through some cleaning and flushing steps which only helped temporarily. When it happened a second time, they sent us a whole new faucet. Im still giving 5 stars because its beautiful, otherwise works perfectly, and the company provided fantastic customer service. Ill update if the new faucet has the same trouble.