Manage the Environment

• Because temperature and humidity contribute so mightily to the growth of mold and mildew in the shower, it makes sense to control those two factors to the greatest extent possible. The best way to control temperature is to turn down the heat in the bathroom when you're not using it. To address humidity issues, consider installing a ventilation fan, air conditioner or dehumidifier, or simply leave a window open to let air flow through the room. To keep warm, electric heat is the best option because it doesn't contribute moisture to the bathroom like gas or water heat.
  
  

Drying

• After gaining control of the temperature and humidity, your next task is to keep the bathroom and shower dry and clean. Leaving water clinging to the walls or curtain is an invitation for mold and mildew to set up shop. It takes a little extra time, but use a sponge or squeegee to wipe down the shower interior after each use. Don't let damp clothes pile up on the floor, and use individual hooks for towels.
  
  

Cleaning

• There's no substitute for a regular cleaning of the shower area. Simple baking soda can be mixed with water and salt to form a paste that can be used as a scrubbing agent when you clean your shower. Likewise, vinegar and lemon juice can be used alone or mixed together with water and soap to create a natural cleaning product for mold- and mildew-prone areas. Bleach is the granddaddy of effective mold and mildew removers, but it contains powerful chemicals and should be used with care, especially if there are children, elderly or other people living in the house who are prone to respiratory issues. No matter how healthy you are, take care when using bleach in enclosed spaces such as a shower stall or tub.