I need to try and figure out what's wrong with my shower. When I run the water faucets (cold and hot), and I have the right temperature set everything seems fine. But when I use the shower head I have to adjust the water faucets to the point where there is little cold water running but the hot water tap is on half way. I have to do this every time if not the temperature changes to wicked cold even though the temp is right before I turn the shower head on, and if I go to turn the cold water tap down I have to almost shut it off to get the right temp to have a shower. I need desperate advice on this problem right away, it is starting to get on my nerves. Thank you.