I've heard you can use a teflon foot for sewing PUL, although I haven't gotten one yet. What i do is make sure to always sew with the sticky side of the PUL always facing the feed dogs, and the fabric I'm sewing it to facing the foot, which helps. When I need to sew 2 pieces of PUL together (for wetbags, etc) I wrap the edges in a strip of tissue paper and then rip it away when I'm done sewing.