I received a call from a G.C yesterday that a Kallista faucet he had installed 5 yrs ago was giving the customer trouble. The customer said that even from the beginning, the pressure from the sprayer was terrible and now you squeeze the handle and get a dribble for 1 second...then nothing. I changed the diverter....nothing changed. The sprayer and hose were changed before and that didn't help anything either. Has anyone else had trouble with Kallista faucets?