Bleaching white clothes with lemon juice: Mix 1/2 cup lemon juice (or sliced lemons) with one gallon of very hot water. Soak the clothes in the solution. Do not use for silk, it is best for cotton and polyester. Let the clothes soak from an hour to overnight, depending on how badly the clothing needs bleaching.leaning copper: Cut a lemon in half and sprinkle salt (any kind – even sea salt) onto the lemon. Massage the lemon wedge onto the brass, squeezing the juice out until the tarnish is buffed off. As it stops working, add more salt to the lemon.