Try water soluable on the top of patch. Could just be flannel poking up through the stitches.
I,m ready to try anything! Thank you
Sounds to me that your needle is too big...try a smaller needle. You also may need to loosen your tension....or lessen the density of your "design"
I used a size 11 regular needle Would a blue tip or other special needle work better? The flannel is so thin I can see the needle holes around the letters. Thank you for helping