Beware of bleach on styrofoam. Eats it. I'll call home & get the wife to mail me info on what I use.
Well, used to. I have been letting all my birds hatch their own the last few years.....
I agree, I was going to state the same thing on my reply, just from my experience with bleach. But I didn't know for absolute sure about it deteriorating the styrofoam, so I never took any chances and always rinsed very well and never used a real strong solution, nor let it set for any time.
Make sure to rinse really good.