As previously mentioned in multiple threads: Babywipes.
Lint free, unscented, Ph Neutral, and a mild detergent action that can still deal with the outputs of the biological WMDs that are young children. So, it will cope with anything you might have split on the interior.
Cheap as too...
Oh, and hypoallergenic.
Edit: Multi-surface too, if that wasn't already obvious from the reference to young children.