The Mel Gibson movie, Signs. Half drunk bottles of water on the bedside table can come in very handy in case of an alien invasion.
‘Signs’ had a good message in it. One many most likely missed.
I like the theory that they are demons, not aliens.
That’s why the first reports of what worked against them were holy water in churches, and it is why the little angel girl’s blessed water worked when other things likely didn’t.
Aliens that can’t stand water in all forms are literally stupid to come to a planet where it covers most of the surface and is a component of the atmosphere.
Demons erupting worldwide now that most of the population doesn’t know about them is plausible, well, as much as that concept could be.