Faucets: Combat lime scale by rubbing lemon juice onto the taps and letting it sit overnight. Wipe with a damp cloth.
Grout: Spilled morning coffee on your tile countertop or backsplash? Here’s how to tackle grout stains: Add lemon juice to 1 or 2 teaspoons cream of tartar (an acidic salt that acts as a natural bleaching agent) to make a paste. Apply with a toothbrush, then rinse.
Hands: When you touch raw fish, the smell can linger on your fingers. Rub your hands with lemon juice, which will neutralize the odor.
Laundry: To brighten whites, add 1/2 cup lemon juice to the rinse cycle for a normal-size load.
Plastic food-storage containers: To bleach stains from tomato soup and other acidic foods on dishwasher-safe items, rub lemon juice on the spots, let dry in a sunny place, then wash as usual.