Question
You are trying to get a screw to get into a thread. It won't start. How do you get the screw into the hole you are trying to screw-in?
Answer
Are the screws slightly too big? Did other screws come with the item you are working with? It could be that the screws are not the right ones. Sometimes there are hidden screws in a package or the wrong screws are in package (from a mistaken from the manufacturer).