Try a 16 needle. Most of the time this worked for me, when I was quilting on my DSM.
Another thought is you will get skipped stitches if you're moving the quilt sandwich too fast. The needle will bend ever so slightly as you're moving the sandwich, and will miss the hook. You can stitch slower, but a larger needle will also help with this because it will be a little stiffer.
Last edited by Peckish; 06-16-2020 at 12:30 PM.