The angle valves under my lavatory shuts off the water so I installed a brand new faucet. However, now the water only flows very slowly (both hot and cold). I cleaned out the aerator and see no debris. I also changed the supply tubes (1/2" I.P.S. x 3/8" compression x 12" for both the hot and cold sides). What is going on? The angle valve handles are not stripped (I can see the valve stems going in and out as I turn it on and off). I also tried loosening the bonnet retaining nut holding valve stem and simultaneously loosing the valve stem out so as to increase water flow but to no avail. Any ideas?