The threads on the end of our kitchen sink faucet is messed up, so our Brita filter thingy that screws on is no longer to stay on, it just falls off whenever the water is turned on. One of my housemates mentioned there's a way to rethread a faucet, yet none of us actually know anything about how to do it. He said he thinks it's an easy do-it-yourself thing so we won't have to bother our landlord. Anyone have any insight on this subject?