The struggle of forgetting laundry in the washing machine is one many have had to deal with, along with the musty mildew smell that accompanies day-old wash. Cleaning professionals say that laundry can be left in the washing machine for a maximum of 12 hours without risking mold and mildew. Anything over 12 hours will cause an unwanted odor to form, as well as bacterial mildew, both of which will require a new washing to remove. If you happen to go over the 12-hour limit, use half a cup of baking soda with your laundry detergent to get rid of the mold and mildew.
