Jessica - If you add the flavoring and coloring in the pot, please make sure you remove it from the heat. The flavoring contains alcohol and is flammable. As for clean up, boiling water works great. I just put all the equipment into a bigger pan in my sink and pour in boiling water. By the time the water has cooled enough to put my hands in it, the sugar has dissolved from everything and cleanup is a breeze.
I LOVED this recipe and will definitely make it again. I got tons of compliments and requests for more. It was quick, simple, and blows store-bought lollipops out of the water. The only thing I will change is adding the flavoring and coloring to the pot rather than the measuring cup. Clean up got a bit sticky, though - If anyone has hints regarding cleaning the lollipop mixture out of heat resistant measuring cups or pots, I'd love to hear them.