The vet college recommend treating the eggs from the ms chickens. Temperature of a hundred must be maintained so as not to send contaminants into the egg. I don't remember what the viricide was. My vet said you could use a kitchen ratio of bleach, but remember the tater temp must be constant let sit for a few seconds and then use individual paper towels to dry, but don't rub.Exactly!
Randomly divide the egg batch to 2 groups, sanitize one and the other just dipping in clean warm water , and incubate them together and see the % .
Thanks dax!