: Carefully pour a kettle full of boiling water down the drain. This dissolves the crystals and activates the chemical reaction that breaks down grease.
While soda crystals are excellent for grease, soap scum, and minor blockages, they are not a cure-all. If you have tried the methods above multiple times with no success, you may have a (like a tree root intrusion or a solid object) deep in the pipework. In these cases, it is time to call a plumber. soda crystals unblock drain
To prevent future blockages, once a month pour half a cup of soda crystals down each drain, followed by a kettle of boiling water. This keeps pipes clear of slow grease buildup. : Carefully pour a kettle full of boiling