These wax melts are designed to be melted in a wax melter or an oil burner. These will fragrance large rooms fast! The wax does not get used up with a wax melt, only the scent within it disappears. When you’ve used up all the scent in the wax melt, wait for it to cool, put in a new one. Wax melts come in the standard colors and are not available unscented.