My first attempt at cookies covered in flowed royal icing are now drying on the counter. Of course, I need them to harden ASAP. No planning ahead done here!

Any harm in putting them in the food dehydrator for a few hours? I used Antonia's royal icing recipe. Heck, I used Antonia's no-fail sugar cookie recipe. Now I just need Antonia and you other cookie experts' expertise!