Ofcourse we need to be carefull and use the correct vails.  But to be realistic, things happen, no matter how carefull you are. You can forget your purse or the daiperbag. And then your happy to have an out of date vail in the car of no matter where, even if it’s heated. It’ll still do something and it’s better than nothing at all. So please if your in a situation that a child really needs it and an out of date overheated one is all there is, just give it first and than rush to a hospital!!