I am having this issue and have ruined nearly 40 cookies for a HUGE order. Ugh. they have been packaged less than an hour. I'm using white icing and blue colour for my airbrush that is from my Watson and webb machine. This is the 4th order I have used my machine for and the second time this has happened! I let my cookies dry overnight. Sprayed them this morning around 7am, it's now 2pm and this. Does the cornstarch really work? I can't afford to have any more cookies go wrong for this order. Maybe I need to let the base dry longer than overnight? Longer to packaging? Oven at low temp to cure and then cool & package? Any help would be great!