any way to resurrect a weak fan?

So my refrigerator evaporator fan has become too weak to turn.  Well, it turns, but very slowly maybe 1 RPM when the normal speed is 3000 or so. I have a new one on the way but, before my food spoils, is there any way to perhaps resurrect this existing fan, just to keep it going for 2-3 days until the new one arrives?  I wiggled it once or twice which initiated full speed, but it didn't last.  I also tried lightly oiling it but no difference.  Thanks in advance.