I am replacing the bathroom faucet and pop-up body. I am getting drops of water from the pop-up. It seems there are two holes on either side of the pop-up near the top, and I can see no way to prevent water from getting in these holes and dripping down the pipe. The gasket does not go up far enough to cover these holes, and the flange does not go far down enough to cover them either. I must be missing something extremely obvious. Please help! And thanks

