I bought a Moen faucet for my kitchen when I moved into this house, as I had one in my other house as well.  My other one was always trouble free, but alas this one is not.  The sprayer does not work, and at times there is a wierd loud pulsating noise when using the cold water.  Also at times the water totally stops flowing in both the cold and hot parts of the faucet, and then later it will come back on.  This is very, very annoying as it often happens in the middle of my cooking, dish washing, etc.  I have had the faucet checked and no one has been able to find the problem with it, they...