I am trying to repair a leaky bathroom faucet. It is a two handle faucet, each handle turns a quarter turn for water. The "arm" of each handle unscrews from the body but I cannot figure out how to get the faucet off to get at the leak. There is not set screw holding it on that I can see. When I unscrew the "arm", there is nothing in the hole where they may be a screw. I tried prying in up but I stopped before doing too much damage. Thoughts?