Yeah no way around this, if you get the chains wet then a boiling water flush and immediate re-wax is the way, or coating it in drip on wax if you need to store it until you can get to it, and then do the boiling water flush before the next wax dip. I now have 5 chains rotating on 2 bikes so it works for me that way, though I stay out of the wet mostly.
I've never understood the reason to pour boiling water on the chain and then immediately put it in the wax bath. It seems to me there's a good chance of water wicking between the plates and into the pins. Since wax is hydrophobic I would think it would not flush any trapped water and the water would keep the wax from flowing into the exact places you want it. Just a though, no testing on my part.