The steam from showers usually causes mold above your shower. The moisture from the hot water will moisten the walls and ceiling above, causing mildew to form. It loves humid conditions, and the area above your shower is exactly that! When left untreated, it becomes the mold we all know and loathe.
Stagnant water in your shower can also cause mold to develop, as well as gaps between tiles or any deep corners. If any of this is near your shower, mold and mildew can start to form.
To prevent mold above your shower, wipe the area after a shower to mop up any excess water or moisture from your shower. Opening a window and leaving an exhaust fan to run after your shower will also reduce the moisture and reduce any mold above your shower. Dry and bright areas are mold’s enemy, so get to work making your bathroom their worst nightmare!