Sink With Soda Crystals ((link)) — Unblock

: Pour another kettle of boiling water down the drain. You may hear gurgling as the crystals dissolve and flush away the debris.

Slowly pour 1–2 liters of boiling water directly down the drain. The heat and chemical reaction help break down grease and fat. unblock sink with soda crystals

If the sink is completely blocked with standing water, bail most of it out into a bucket. You need the crystals to reach the drain, not just float on top. : Pour another kettle of boiling water down the drain