I starch the fabric board stiff before I cut the triangles -- when I sew there is no creep, but I do use leaders and enders so the points don't get eaten. I have to wash my fabrics now -- some of the fabrics have something that give my allergies fits when I work with it for any length of time. I use the bottled starch from the grocery store (StaFlo?) and mix it in a spray bottle -- half water half starch. When my bottle is empty, I may try to make my own starch. It would be cheaper.