Some plumbing changes in your home happen so slowly, you do not even realize anything is different. Faucets are a great example of this—one day you realize the faucet is difficult to turn, and wonder how it ever got that way. It did not become hard to turn overnight, but fixing a hard-to-turn faucet is a quick repair any homeowner can do themselves.
A hard-to-turn faucet can be caused by several problems. Your job is helped by knowing (through a little tinkering) what the cause is. Some clues: