Um, since when is oil conductive? Especially at the lower voltage a properly gapped plug fires at? And since it's also used as a dielectric in high voltage transformers?
Oil in the wells won't cause misfiring, put an ignition scope on there and you'll see. Best way to get it out? Mop up what you can then remove the plugs and flush the rest down the cylinder with brake cleaner. Won't hurt a thing.