If you’d rather use a natural way to remove mildew and mold from bathrooms there’s a cheaper, non-chemical way to do so. Fill a 16 oz spray bottle half way with white vinegar. Add water until it is nearly at the top. Then, add 2 teaspoons of tea tree oil. Shake well. Spray on all surfaces that need treating and let sit for a half an hour before you rinse off. The acids in the vinegar combined with the antiseptic oil will break down the mildew.