The steam from your shower can cause mildew build-up in the shower area, so to prevent this from becoming a health problem; like forming germs and bacteria, you should remove the curtain rings from of the shower curtain rod to clean them properly.

Bathroom shower stall curtains will last for a couple of months if there isn't a window in your bathroom, the steam from your shower can cause water damage on the walls and ceiling.

To prevent this from happening you can have a ceiling fan install to circulate the air out of the shower. With proper ventilation your bathroom shower curtains will last you a very long time.