Hi, I have a leaky faucet that I guess probably needs a new cartridge or seat washer or whatever this faucet uses. However, I can't get to the "guts" of the faucet handle. When I take a handle off, there is no hex fastener that my plumbing book shows should be there. Do I need a "handle puller" if that's the right name, to pull off the base of the faucet? I can't imagine I'd have to remove the faucet from the sink to repair this, but I don't know. I can't find any manufacturer name or anything else printed anywhere on the faucet. Please help.