It depends on how often you shower and how much chlorine and other chemicals are in your water. If you shower every day, you should replace it every 6 to 12 months. If you shower every other day, you can replace it every year or two.

It depends. If you have a vinyl liner, it should be replaced every 5-7 years. If you have a fiberglass or acrylic liner, it should be replaced every 8-10 years. However, if your liner develops a tear or hole, it needs to be replaced immediately to prevent moisture and mildew from building up and causing damage to the walls and ceiling of your shower.