jjr4032327 - Please try tightening the valve core. Sometimes it comes loose in transition. Or consider returning the ones that don't work for a full refund?

Ha. Yeah same thing happened to me but with worse results. @ of the tubes upon inflation leaked from the rubber gasket around the valve. I guess I could have glued this back down?! Doesnt make me want to trust the other 2. Why risk that happening during a ride?