You need:

Half a glass of bicarbonate of soda
Half a glass of vinegar
Pour the baking soda into the sink, making sure to get a good portion of it down the drain. Then also pour in the vinegar, which when it comes into contact with the bicarbonate will generate an effervescent action.

At this point you can take advantage and use a sponge to clean the internal surfaces of the sink: the combination of vinegar and bicarbonate is very effective in removing dirt, disinfecting and making the metal shine.

After about 5 minutes, pour plenty of hot water into the sink to rinse and remove all residues, as well as bad odors.

To prevent the accumulation of food or other residues in the sink drain, we suggest you apply this trick periodically, without waiting for a bad smell to form or, even worse, for the drain to clog.

With this trick we will be able to apply an effective and ecological solution to the bad odors that come from the sink at home.