I bought one of the plug in cool bags from Vauxhall to use in my Zafira. Just tried it out for the first time. Connector is temperamental, have to keep tilting it at different angles to get it to make the fan work. It doesn't seem to get cold inside (it was hot outside by the fan) and the food seemed to be warmer when I took it out than it was when I put it in (prechilled purchases from the supermarket. Any ideas of what might be wrong? Sue