OK - here is a tip I got from a longarmer at Machine Quilters Expo - Go out and purchase old fashion Rubber Cement. It is clear, non-slip and when it looks yucky - all you need to do is rub it off and reapply. I let is sit overnight before I use a ruler after applying it. I also have tried the clear rubber grippies and sandpaper stuff - nothing compares to the Rubber Cement. It is flat and clear - oh by the way did I include cheap?? lol.