It's best to use a sewing machine. A good, heavy duty, sewing machine is useful when working with denim, as the layers of fabric can get too thick to sew...
Check your needle; you may need a needle that is designed for quilting that can cut through many layers. If this does not help, then you may either need a...
Most modern sewing machines have an arm feature. You will have an area just wide enough to slip the tube of fabric in place for sewing. Hand sewing is the...