Step 1: Remove excess water from the sink or tub.
First, use a small bucket to scoop out any accumulated water in the sink or tub (you can transfer to the toilet). Then take off the drain cover and clean around the inside edges of the top of the drain using any old bathroom cleaner. If you notice any hair or soap scum close to the surface, take a paper towel to reach in and pull it out.
Step 2: Mix a drain-cleaning powder.
In a mason jar, combine 1/2 cup baking soda, 1/2 cup salt, and 1/8 cup cream of tartar.
The salt and baking soda will help break up the clog, while the cream of tartar—which is probably hanging out on your spice rack or with your baking supplies—cleans metals. Put the lid on the mason jar and give the homemade drain cleaner mixture a good shake before pouring half of it down the drain. Save the other half for your next drain cleaning.
Step 3: Pour hot water down the drain.
Wearing rubber gloves to protect your hands, pour 2 cups of hot water down the drain (this is easiest to do if you heat the water in a teakettle), and leave the drain cleaner and hot water to sit for at least an hour.
Step 4: Flush the drain with water.
After an hour has passed, run the sink or tub tap for a few minutes to clear the homemade drain cleaner from your drain and make sure the clog is gone. Use paper towels to wipe up any residual powder. And now that you have such a quick, low-cost solution at the ready, keep future clogs at bay by making cleaning your drain part of your regular routine.
