Thanks for all the great advice! I've been using the Wilton gumpaste powder in a can, where you just add water. Maybe next time I'll try homemade stuff. I also tried the cornstarch and it worked so much better than powdered sugar. I made sure to keep the gum paste covered as well. All of these things seem to be helping! I'll post some pics of my sugar flowers as soon as their all done. Thanks again!