We use peroxide to clean wounds. It bubbles the "yuck" out and hurts less than Iodine, I think.
The problem with Peroxide is that it also will damage healthy tissue and cause it to be necrotic. Flushing with distilled water then iodine is better, or betadine. However, I have been flushing the ears out of the birds with theirs infected because I have to use something that will break up and clear out that gunk. They would not stand for the iodine or anything else that would be effect with what they have going on right now.