The answer to 'how to fix faucet' is to first turn off the water supply to the faucet. This is usually done by locating the shut-off valve under the sink or behind the faucet and turning it clockwise to the right. Once the water is off, you can remove the faucet handle, unscrew the retaining nut, and pull out the faucet cartridge or stem. Clean any mineral buildup, replace worn washers or O-rings, and reassemble the faucet. Turn the water back on slowly to check for leaks and make any final adjustments.
Fixing a leaky or dripping faucet is a common DIY plumbing task, but it's important to take the necessary safety precautions and follow the proper steps. If you're unsure about any part of the process or the faucet is difficult to access, it's best to call a professional plumber to handle the repair.