Before you reach for that heavy-duty, chemical-smelling bottle of drain cleaner (and before you call an expensive plumber), look in your pantry. The solution to your problem is likely sitting right next to the flour and sugar:
If your sink is full of water, you need to bail it out first. The reaction works best on a damp drain, not a flooded one. bicarbonate of soda to unblock sink
Also known as baking soda, this white powder isn't just for fluffy cakes and deodorizing the fridge. It is a powerhouse natural cleaner, and it is brilliant at unclogging drains. When a sink drains slowly, the culprit is usually grease, soap scum, and bits of food. Bicarb is a mild alkali. When combined with another common household hero (vinegar), it creates a fizzing, foaming chemical reaction. Also known as baking soda, this white powder
The chemical reaction between commercial cleaners and vinegar/bicarb can create dangerous fumes or even cause the pipe to heat up dangerously fast. If you have already poured chemicals down, wait at least 24 hours and flush heavily with cold water before trying the natural method. If the sink is still gurgling after the first try, don't give up. Sometimes a tough grease clog needs a "paste" treatment. Bicarb is a mild alkali
There is nothing that stops a busy evening in its tracks quite like standing in an inch of dirty dishwater. You turn on the tap, and instead of a satisfying swirl, you get a slow, gurgling rise of water. The sink is blocked.