The bathroom is the one room of the apartment most likely to suffer water damage. After showering, wipe any water from the walls onto the floor, and from the floor into the floor drain using a squeegee. Furthermore, it is also a good idea to leave the bathroom door ajar to help it dry faster. If your apartment is equipped with an apartment-specific ventilation system, the extractor should be set to its most powerful setting during and after activities such as showering and dealing with wet laundry.
The best way to clean grouting between wall tiles is by using a brush and cleaning substance designed for the task.
The bathroom floor drain and sink drain trap should be cleaned out regularly. Hair and dust can gather in the water lock, which in the worst case scenario can block the water lock and cause water damage.
Watch a video Cleaning the bathroom floor drain
Watch a video Cleaning drain traps