Hey there! Using PPI Mouth FX is super easy. First, decide how you want to use it. If you want to color your whole mouth, just put 3 - 4 drops on your tongue and swish it around. Or, if you want to color a specific spot, like your lips, use a cotton swab or a brush to apply it directly. You can also mix different colors to make your own unique shades. If you want a lighter color, add some water to it. And if you want a really bold look, you can use it with Fleet Street Pegworks Tooth Lacquers or dental appliances. When it's time to remove it, brush your teeth with toothpaste and rinse with water. If it's still there, just do it one more time. If it gets on your skin, wash it with soap and water or shaving cream. Do it again if needed. Remember, this product is made of FDA - approved food - grade ingredients, and it's vegan, gluten - free, peanut - free, sugar - free, and cruelty - free. So you can use it with peace of mind!