Our hard plastic flanges can be cleaned in a dishwasher on the top rack, but they will last much longer hand washing with warm water and a grease cutting dish soap because automatic dishwasher detergents can etch the surface causing them to become foggy. 

So while you can clean the parts in the dishwasher, we do not recommend it and we do not replace parts that are damaged in the dishwasher.  Don't use any chemicals such as bleach to clean or sanitize the flanges.

Reviewed by Diana West, IBCLC
June 10, 2021