When the faucet was first installed it looked beautiful and worked like a charm.  After tarts of use, the chute where the water flows from has become "water stained".  It does not come off with with just a damp cloth.  I contacted Pfister and to my amazement they sent me an entire new faucet.  Kudos for Pfister standing behind their product.  Installed new faucet and all looks beautiful again!