You should first shut off the water supply beneath the sink before attempting to fix the leaky faucet. This can usually be done with the silver knobs beneath the sink. Once you have shut off the water supply, remove the handles from the faucet. You can also unscrew the weights if the faucet has plastic ones. If you can't remove the weights, you can clean the rubber seals with a microfiber cloth and vinegar.
Try testing for a leak
If the problem isn't immediately apparent, you can try testing for a leak by placing a paper towel or small container under the spout of the sink. You can then examine it later to determine if the paper towel or cup is still wet. If you can't find a leak, call a plumber and have him fix the leak.
Depending on the model of the faucet, you may have to dismantle it completely. Before attempting to replace the parts, make sure that you label each part that you remove. This will prevent any further problems after reassembly. Ensure that all parts are replaced in the correct order. Then, start reassembling the faucet. Reassembling the parts should be done in the same order that you removed them.
Replace the hose
If a leak continues to occur, try replacing the hose. This is a less expensive option than replacing the whole faucet. It is also easy to do yourself. To replace the hose, you can shut off the water supply and disconnect the spray hose from the high-pressure hose. Before you connect the new hose, be sure to check the connection between the new hose and the high-pressure pipe to be sure it works properly.
You may also need to replace the seat and springs in the faucet. This should stop the leak under the handle. If the leak is in the spout, you can replace it by using an Allen wrench. Be sure to use caution if you attempt to remove the seat or spring with a wrench as it could break.
Shut off the hot and cold water supply lines
Once you've fixed the leak, the next step is to shut off the hot and cold water supply lines. This is a crucial step as not shutting off the water supply will lead to flooding the bathroom. Additionally, you should ensure that the shutoff valve is not clogged with any water.
If you can't locate the leak, try replacing the valve and washer. A dripping faucet may be the result of loose screws, damaged o-rings, or corroded valve seats. However, if you can't fix the problem on your own, it's best to get a plumbing professional to fix the leak. You may also have to replace the faucet entirely. You can also try repairing a faucet with a replacement kit.
Use vinegar
The repair process for a black kitchen tap is usually simple and takes less time than you think. It may include treating the blockages with vinegar or replacing smaller components. The parts that need replacing will depend on the type of faucet. If you do decide to tackle this repair yourself, make sure to take note of all parts and reassemble them properly later.