Citric acid
Finally, in the family of practical and effective natural products for this type of task, we obviously find citric acid, commonly used in homes, especially when it comes to eliminating limescale and dirt. fats. It will also work to purify the ambient air by eliminating bad odors emanating from the sewers.
Simply pour half a teaspoon of citric acid down the bathroom drain and one tablespoon down the toilet. Always leave it on overnight. The next morning, pour a bucket of hot water over it. And the result is impeccable!
Good to know
Remember to use the ingredients indicated in moderation, respecting the quantities. If the sewer smell really persists, the problem is more serious than it seems. It is therefore better to call a professional.