I saw a post a couple of months ago on a thread here and I am cutting my strips backward. It is a little awkward leaning a new technique but with the 6"x24" ruler completely on the fabric, I find it is not slipping as much any more. I use a smaller ruler to line up for measuring the width of the cut. The way I learned to cut, most of the ruler is sitting on the rotary cutting mat and only the width of the cut had the ruler on the fabric. Hope this makes sense. I also have Omnigrip rulers