In many houses the bathroom has no window, only ventilation. However, this does not mean that the bathroom can not smell strongly. Also, without a window, more moisture and mold develops on the walls, which causes an even stronger smell.
If your bathroom does not have windows, see what you need to do. The first thing to remember is that first after each bath you lay towels and mats on the balcony to dry well and be sure to change towels at least once a week.
It is also important to leave the curtain open for a few minutes to remove moisture from the bathtub and then close it so that the curtain itself can dry more easily.
The basic trick you can do, though, is hide in a material. The reason for activated carbon.
Activated carbon has been produced industrially since the early 19th century and is a compound of great usefulness in medicine, pharmaceuticals and other sciences. To quickly remove unpleasant odors, put some activated carbon in a beautiful container and leave it in the bathroom. All unpleasant odors will go away in a few minutes. You can find activated carbon in pet shops or online stores.