Thanks a bunch for all of your advice. I hope the ones that I've made before don't melt or deteriorate. I use regular thread for putting the blocks together though. I just hate the thought of the solid color thread running over the design on the fabric. Sounds goofy, but I want everything to be seen. I'd rather use regular though instead of risking future issues from using the clear thread. So do any of you use the nylon for stitching in the ditch?