Had no clue where to put this so I will try here. Anyway, the eggs I have are starting to get a bit older (we just haven't been eating a lot lately)......some have been sitting for quite awhile in fact. I wasn't worried since I know they last forever, but I did the float check anyway....just to be safe. I have eggs from my chickens and eggs from my mothers chickens. All of mine were fine and passed with flying colors, even the oldest ones. Only one of my mom's eggs passed (out of 6) and I haven't had hers near as long as some of mine. I know she doesn't wash her eggs, none have been refrigerated, they were gathered the day they were laid and brought indoors, never refrigerated. The ONLY difference was that mine are in a bowl and hers in an egg carton (styrofoam). Could this be the reason?