Vinegar and baking soda mixed together break down fatty acids in a clog, allowing it to be flushed down the drain.
Put about 3/4 cup baking soda down the drain. Pour in 1/2 cup of vinegar and then plug the drain to keep the reacting chemicals in the drain instead of letting them bubble up and out. Half an hour later, remove the plug and pour a tea kettle of hot water down the drain.
Pack the drain with baking soda. Boil 2 cups of vinegar. Pour the vinegar down the drain slowly and carefully, keeping your face averted. The chemical reaction will start immediately and be quite forceful. Plug the drain and leave the vinegar and baking soda to work for a few minutes. Unplug and flush the drain with water.
You can repeat either method if needed, or use them sequentially.
Tubs And Sinks
You can use this strategy to unplug clogged tubs or sinks. The process will not harm your garbage disposal.