My son is trying to replace a washer in my Peerless bathroom faucet, because the cold water drips a slow drip continually. It might be a washerless faucet, we just don't know. He took an Allen wrench and removed the cold faucet top. There is a brass thing that sticks up that the handle attaches to. There is a plastic thing that is around the brass stem and we can't get any further. Does anyone have any suggestions?