Also for deodorizing when it is difficult to ventilate the room. I found "deodorant power" for trash cans at a drug store and bought it.
A product called "deodorant power for trash cans" developed by ST Corporation. The drug is contained in a bean-shaped container, and you can choose from two ways to use it, "attach it to the lid with double-sided tape" or "hang the hook on the edge and hang it" according to the shape of the trash can. Not only does it "strongly deodorize unpleasant odors in the trash can", but it also has a repellent effect to prevent flies. There are two types of scents, "citrus mint" and "menthol squash".
As for the impression that I actually used, the impression that the fishy smell disappeared from the trash can. The "menthol squash scent" I chose was quite strong, but it didn't leak out of the trash can, so I could use it without worrying about it. The standard usage period is about one month. When the drug disappears from the window of the container, it is time to replace it.
The set of two was sold at the drugstore I went to for 359 yen (tax included). How about using it in the winter season when odors tend to stay in your room?