ground coffee
Thanks to its degreasing and deodorizing properties, ground coffee is useful for deep cleaning of pipes: just pour a cup of ground coffee into the sink or washbasin and pour hot or boiling water over it. Let it act and see: Flow is much better, isn't it?
Advantages of natural methods:
It is economical and does not require the purchase of additional products.
Environmental, they do not pollute the environment.
They pose no danger of attacking the walls of your pipes.