About a month ago I lost all pressure in my kitchen faucet. When I removed the nozzle there was a bit of calcium in the screen. I cleaned it out and still no pressure. The plumber said that it was built up in the faucet itself and that needed to be replaced. It worked for a couple of weeks with the new faucet but stopped working again. Another replaced faucet and it is working fine. How do I fix this so that I am not replacing my faucet every month?