I was attempting to change a washer in my bathtub faucet. I removed the plastic disk, unscrewed the plastic handle cover and found underneathe what looked like a second handle made in metal which I could not for the life of me remove. Do these unscrew? Do you pull them off? This 2nd handle has no screw in it and I was unable to pull out the cartridge or whatever was behind it. Has anyone seen a faucet like this.