I'd just take the 10 seconds required to remove the OBC, pour the contents of the DampRid into a disposable baking pan, and then place the OBC on a tray (or piece of foil, etc.) in the middle, and then cover the pan with a lid (or foil) to seal it off. Leave it there for a few days and hopefully most of the moisture will have been pulled out.
The rest of the car's interior could probably stand to have a DampRid or two left in there for a bit, too.
1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
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