Brita filters on a shelf.
How To Clean Mildew From A Brita Pitcher

Although it's easy to assume that a water pitcher doesn't get 'dirty,' a Brita filtration pitcher needs periodic cleaning and maintenance to keep it effective.

Brita pitchers should be deep cleaned every two to six months, depending on how frequently you use it. Start by removing the lid, reservoir, and filter from the pitcher.

Discard the old filter and follow the instructions on preparing a new one. Wash the remaining parts in warm, soapy water using a soft sponge.

Mildew can be gently scrubbed away using a solution of one cup of warm water and one teaspoon of white vinegar. White vinegar breaks down dirt and bacteria.

Allow the parts to soak in the solution for 30 minutes, or use a soft toothbrush to reach difficult areas. Rinse the parts in hot, soapy water and air dry before reassembling.

If vinegar's strong vapors are offensive to you, don't worry; the odor dissipates once the vinegar is washed away, and it won't taint the taste of your drinking water.