Keep drains clear by treating them monthly with boiling water and 2 tablespoons of baking soda or, infrequently, with a liquid drain cleaner. These cleaners may also clear partially clogged drains. If you use a chemical cleaner, follow the directions and rinse the drain afterwards.
Caution: Chemical drain cleaners are dangerous. If you splash any on your skin, wash it off immediately in cold water. If a drain is clogged and the cleaner remains in the sink, call a plumber. Don’t try unclogging the drain by other means; the leftover cleaner may splatter you.
Using a plunger