Using this KRYOLAN Aquacolor Liquid is easy. First, make sure the surface you want to apply it to is clean and dry. You can use a brush or sponge to apply the liquid evenly. For clothing and shoes, test it on a small, hidden area first to see how it looks. When using it for baldness effects or masks, be careful around the eyes and mouth. After use, wash your tools with mild soap and water. Store the product in a cool, dry place away from direct sunlight to keep it in good condition.