To unclog the sink, look no further than your pantry because here is a very effective way to unclog sinks using vinegar, baking soda and water.
Step 1 - Put about 3/4 cup DRY baking soda down the drain.
Step 2 – Pour 1/2 cup of vinegar down the sink after the baking soda. Be sure to cover the drain immediately afterward with a rag or plug, filling the hole completely so nothing can escape. This is because the interaction of the two will cause a “mini volcano” that will want to come up, you want to keep it down there.
Step 3 – Leave this concoction in the drain for about 30 minutes. While you’re waiting, boil about a gallon of water.
Step 4 - After 30 minutes, remove the plug and slowly pour the HOT water down the drain.
I haven't tried it out for myself yet, but it excited me nonetheless.