I heated chicken soup in a milky microwave until it was hot, by mistake, what’s the status now of the microwave and chicken soup?
My apologies that it took so long to get back to you. The microwave needs to be kashered. This can be done by first cleaning out the microwave from any dirt etc. on the walls or plate. Then take a cup of water and heat it up for a few minutes, so that the microwave will fill with it’s boiling steam. Then in order to kasher the part of the plate that was under the cup, move the cup to another part of the plate and repeat.
Regarding the chicken soup, since it now has steam and absorbed taste from the miky walls of the microwave, you shouldn’t eat it.