If you're into DIY projects, then you're probably familiar with the concept of oil found in common hardware stores. The oil is used to loosen a stubborn screw or some screw that's getting stuck inside a piece of equipment. What you may not know is that you can use this same principle with your gravity feed automatic opener - something that you should think about doing if you run an online store or want to sell products online. You'll be able to open and close the item instantly whenever someone opens it up on the web site or buying buttons are clicked.