In this video, This Old House plumbing and heating expert Richard Trethewey has a quick fix for a slow-flowing faucet.
1. Unscrew the aerator from the end of the sink spout. If you can't twist it off by hand use an adjustable wrench or pliers. If using pliers, protect the aerator with a rag.
2. Lay a washcloth over the sink drain and turn on both the hot and cold water to flush out the water lines. The washcloth will catch any debris or sediment.
3. Rinse off the clogged aerator and thread it back onto the sink spout. Or, simply replace the old aerator with a new one.
4. Turn on the hot and cold water to ensure that the water flows smoothly.