ORIGINAL: Steve Collins
Another trick for getting the air line off easily with no lengthwise scratches is to use wire cutters. Use the wire cutters PARALLEL to the nipple and ''nip'' off as much of the line as you can on one side. Then pull the line away from the nipple sideways in the direction opposite of where you cut away some of the material.
Yes. This is the correct way to remove a line from the nipple.