Tired of battling the mildew that builds up on your bathtub, glass shower doors, or vinyl shower curtain liner? There’s no need to buy expensive daily shower spray. Instead, here’s a simple formula you can make yourself. It’ll stop that crud before it ever has a chance to form.

Mix 1/2 cup of rubbing alcohol, 1 tablespoon of liquid laundry detergent with enzymes, and 3 cups of water in a hand-held spray bottle, and keep it on the side of the tub. Then issue an all-points bulletin that says the last person out of the shower or bath each day must spray the solution on all of the wet surfaces. Follow up once a month by scrubbing the walls with the same solution, and you can kiss mold and mildew good-bye.