I can't see how you'd avoid it. The charge on the molecule is going to be one of the things keeping it repelled from other water molecules, so as you take char

I can't see how you'd avoid it. The charge on the molecule is going to be one of the things keeping it repelled from other water molecules, so as you take charge off it, there are fewer internal forces to keep them apart. That's got to be a reduction in the vapour pressure, right? In the right circumstances the water will condense out. I think that's got to be the engineering limit of the "stack of thousands of sheets" idea they mention: somewhere down the stack they short out because water droplets will condense out into liquid on the sheet. This all assumes a net charge one way or the other on the body of water vapour. The article doesn't make it clear but I assume that's inevitable.