: Pour half a cup of baking soda into the drain, followed by half a cup of white vinegar. Cover the drain and let the fizzing reaction sit for 10–15 minutes to break up the grease before flushing with hot water.

By following these steps, you can clear even the most stubborn grease blockage without an expensive call to the plumber.

You can often clear minor to moderate fat blockages using items already in your kitchen. 1. The Boiling Water Method