S.B.
In addition to altering or switching your recipe, try drying it out in a low temp oven as opposed to letting it sit out to harden. I don't know how the weather is where you are, but the dough will absorb humidity from the air and that might be why you are having so much trouble. If it's a recipe you have to cook, try cooking it a little longer to get out some of the gooey-ness before you start working with it. Good luck!