Many people want to grow long nails but for some reason their nails will not grow. Some people have brittle nails that easily break and some people have very soft nails that cannot seem to grow strong. Nail hardener is a great product that people can use to help them with the battle to grow nails. In order to grow nails the nails must be relatively healthy and strong. Nail hardeners help to meet this function. It is important to keep the nails clean...