How can you quickly disinfect the washing machine tub and remove black mold stains?

Prepare a mixture of 4 parts water and 1 part hydrogen peroxide. Pour it into the tray. It is a  liquid  that will help  disinfect the tray by eliminating mold and bad odors . Leave the tray to soak for at least a few hours for optimal effectiveness.

In the meantime, take a bowl and prepare a sort of degreasing paste by mixing 3 tablespoons of coarse salt and 3 tablespoons of  dishwasher liquid . When the mixture is smooth and grainy, take an old toothbrush. Rub the entire surface of the tray vigorously, paying particular attention to the areas most affected by stains. The tray will look  like new  after a few strokes of the toothbrush.

If the result is not satisfactory, repeat the cleaning operation from the beginning.