hi lol...i have about 10 dapen dises and understand where your coming from, basically i use scaulding hot water and wash in my sink with gloves on obviuosly and pick the sides of the acrylic up... as the dapen dish is a shiny surface the acrylic wont adhere to it well so it works well, and then steralise it for next day
people will probably have something to say lol...but its alot easier and cost effective than acetone x