Well I just boiled several of todays FRESH out of the nest boxes eggs. So far my findings are:
One fresh egg I boiled in just water and nothing else. I tried salted water, vinegar in water, one egg I pricked a hole in the big end of the egg and put it in hot tap water.
All but the egg...
I have tried everything and found the best way to peel an egg is to keep some in the fridge for several days ( a couple of weeks or more the better). After I boil them I plunge them in ice cold water. Works every time for me.