This dry shampoo does not require any gas at all. A mixture of baking soda, starch and clay effectively binds grease and mattifies the roots without drying out the hair. Dry shampoo is not a substitute for wet washing. You should not use it for more than 1-2 days before washing your hair again.
Fill the dry shampoo container and then simply sprinkle some powder on the palm of your hand, rub it in, rub it through the greasy areas and then brush your hair. It is better to use a little less at first and repeat if necessary. Then wash your hands. Do not sprinkle on clothing - otherwise gently tap out, do not rub.
