Homebrew PCBs

I'm wondering if some of the toner removal problems might not be from 
too much heat. When I was doing direct laser printing - laser 
printing directly on copper-clad, I was "cooking" it in a toaster 
over  to fuse the toner to the board. If it got too hot it was 
extremely difficult to remove the toner from the board after etching 
using acetone, but if it was cooked less, it was quite easy.

Mark