That strange smell that is so annoying

Lemon, how to use it to enjoy its benefits to the fulles
Added to them is one more remedy: lemon which, like vinegar, is never missing when cleaning the house. Pour the juice of 2 lemons down the drain and let it sit for one or two hours. It will be much more effective if the lemon remains in contact with the smelly drains for at least one night.

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Then the next day, simply pour some water down the drain and the smell will be completely gone. It will also leave an excellent lemon smell, giving a pleasant sensation of freshness and cleanliness for a long time.

Citric acid
Finally there is citric acid, only 150 grams are enough , which must be poured into a liter of boiling water.

Let the mixture sit for at least one night in stinky drains , whether it’s a sink, shower, bathtub, or toilet, it doesn’t matter. Then you turn on the water jet and that’s it.