In addition to being an excellent bleach, lemon juice is an antiseptic. This environmental ingredient can be used in several ways to overcome yellow spots. It is possible to put the equivalent of two lemon juice directly into the detergent drawer of the washing machine before the cycle at 90 degrees.
In soaking mode, you will only have to add the juice of about ten lemons, in enough boiling water, to allow the ear to be completely submerged. Then, if possible, it should be washed in a washing machine.
Another solution is to add hydrogen peroxide in a 2 to 1 ratio. Example: 200ml of hydrogen peroxide to 100ml of lemon juice. Again, the entire pad must be covered to allow the preparation to work. Finally, machine washing will effectively complete your whitening session.