The copag and kem are 100% plastic - so ironing isn"t going to be the solution here!
Dishwasher is an interesting idea, but I"d make sure they"re on the top shelf as a lot of plastics will melt if they"re on the bottom shelf and close to the element.
Now that your pack is ruined, I think you should experiment with washing machines, dishwashers, soaking them in the bath, bleach, etc., and post images to go with your studies!