Shifting gears slightly: I've read several comments that water in its various forms could not exist in deep space. This OLDER ARTICLE says yes, in frozen and vapor form. In its frozen form it has attached itself to dust particles which accounts for ~99% of the water. The remaining ~1% in vapor form. What if comets, because of the nature of their travels, gather up this dust/ice along the way? Maybe on each circuit even, renewing its supply???
How? Their gravity is miniscule. The only way that would work would be to again accept an electric nature with a charge that would attract the water.