Measure two additional cups of tap water.

Pour the tap water into a tea kettle and heat the water until it boils.

Boiling water may cause burns. Handle with care. Turn stove off after use.

Slowly pour boiling water down the clogged drain.

This is to avoid splash back and possible injury.

Allow the water to drain completely.

Run the tap for approximately 5 - 10 minutes.

It might take more than one attempt to clear the clog. Repeat this procedure as needed.