Before you try to unblock a sink, it's important to understand what's causing the blockage in the first place. In most cases, sink blockages are caused by the buildup of food, fat, and grease that accumulates in the pipes. Soap residue, hair, and sediment can also cause blockages.

The first step in removing a blockage is to identify the underlying cause. This can be done by removing the plughole and checking for any blockages within the pipe. If you can't see the blockage, use a plunger to try and dislodge it. If that doesn't work, it's time to call in the professionals.