Every 3 months pour half a bottle of vinegar down the drain – let it sit for 30 minutes and run hot water for 1 minute. It will help keep your sink’s pipes nice and unplugged.  If you have a tough clog, add a tablespoon or two of baking soda first, then pour the vinegar…let it sit for 15 -30 minutes and then flush with hot water, amazing!  Side benefit to this method: If any baking soda remains, it makes for an awesome cleaning agent to just wipe up your sink!