Man, you may want to go through the trouble of wetting down small sections at a time checking for starting after each, and find out where the problem is and fix it.
If it does it during a simple wash, you'll be hosed (so to speak) if you get caught in the rain.
I don't wash mine often, but when I do I hose down everything, no care not to wet something, just a lot of soap and water, then I crank it up to dry the engine while wiping down the rest. I've ridden days in downpours, and the bike never had a problem. I never cover anything with bags (except the Sirius when riding in rain) and never 'greased' any connectors.
But since you've identified it as a problem, I'd make it a point to resolve it before it bites you.
