Apply a pea-sized amount under arms. You may need to soften deodorant with the warmth of fingers for better spreadability. Baking Soda may irritate those with sensitive skin. Gently exfoliate underarms weekly with loufa, soft brush, or cloth to avoid build-up. Avoid applying directly after shaving armpits if you have sensitive skin. Leave out of direct sunlight or heat, as it will melt. If melting does occur, simply place it in the fridge for a couple hours, then re-mix with a clean toothpick to combine.