Mold in the bathroom: how to get rid of it quickly and easily

Install a fan proportional to the size of the bathroom and turn it on for at least half an hour, after the shower. If you don’t have a fan, wipe down the bathroom walls and mirrors
Seal any gaps or cracks in the tiles to prevent water from escaping. Replace the silicone periodically. Silicone doesn’t last forever, and when it stops doing its job, it needs to be replaced.
Open the windows after bathing or showering to help them dry faster. Does your bathroom have no windows? Consider installing a mechanical fan or an exhaust fan with a backdraft system.

Once you’ve finished showering, pull the curtain so that it can’t create mold between its folds.
Clean the bathroom regularly, at least once a week. Don’t forget to wash the walls, the curtain and, if applicable, the carpet(s). Bleach prevents mold from growing, so it’s very useful in this case.
Paint the walls with semi-gloss, anti-mold acrylic paint
Install an electric dehumidifier
Instructions for removing mold