Step 2 · Attempt Boiling Water Flush
Bring a large pot or kettle of water to a rolling boil. Carefully carry the boiling water to the sink and slowly pour it directly down the clogged drain. If you have a double sink, pour it down the side with the garbage disposal. Pour the water in two or three stages, waiting a minute between each pour. The intense heat can sometimes be enough to melt the solidified grease, allowing it to be flushed down the pipe.