Foreign substances
Foreign objects such as toothbrushes, diapers and wipes can cause serious clogs when thrown into sinks or toilets.

What are the natural remedies for cleaning exhaust pipes?
There are many natural methods to clean home drains, and they are all dictated by professionals in the field:

Hot water and salt
Pouring a solution of hot water and coarse salt into sinks or bathtubs can help loosen grease residue and clear minor clogs.

baking soda and vinegar
This is a very effective means of eliminating limescale and accumulation of organic substances. Pour a cup of baking soda followed by a cup of vinegar into the pipes and leave for about an hour before rinsing with warm water.