Thanks Jerry and Jim.
Think it is the age of the fridge. There is a cooling panel inside it. As part of the frost free function it melts the ice on the panel. When I remember I will wipe off the condensation while it is not frozen. Done this a few times and I think there has been small increase to rate of weight loss.
Just have umai projects in fridge and was in an uninsulated garage but now in house. Will keep eye out for another fridge.