Removing the blockage with baking soda and vinegar.
The advantage of the method is availability - these ingredients can be found in every home goods store in everyday life. The concentration of the solution is as follows:
Pour a glass of soda into the sink, then run a glass of vinegar.
Leave the sink for half an hour, do not turn on the water, or use the plumbing.
When the reaction is over, flush the pipes with plenty of water.