Using this mascara fixer is a breeze. First, if you're using it as a base - coat, apply it before your regular mascara. Just coat your lashes evenly from root to tip. If you're using it as a top - coat, wait for your mascara to dry a bit and then apply the fixer. For best results, make sure your lashes are clean and dry before application. Keep it in a cool, dry place. If it gets into your eyes accidentally, rinse thoroughly with water. And that's all you need to know to keep your lashes looking great!