I fold it over and then run my finger nail down the fold, then it tears off slick as a whistle. I hold it along one seamline with one hand and tear with the other. I work down longer seams, holding and tearing.
Holding it along the seam line helps you from stretching out bias edges, even though they are sewn, they can still pucker or bubble up :wink: Or from putting undue stress on the stiches, especially at the beginning and ending of the seam lines.
It doesn't work as well on some of the thinner paper, which is why I only use copy paper.
Also, you need to have your stitch length set for really short stitches.
I have tried dampening the paper as some suggested, but it left more bits in the seams when it got wet and didn't tear for me... it just came apart :roll:
Hope this helps you :D:D:D