I had the same problem with a new faucet I installed. Didn't dawn on me until I checked all the major things. Unthread the cap, pull out the filter/washer and perhaps you'll find dirt clogging the filter/washer. Just clean or replace it and perhaps your problem will be solved. Never hit me that the new faucet I just installed would get clogged the first couple of try's, but it was. Sometimes it's the simplest of answers that solve our problems. Hope some of you find this useful. Laura