Which substance kills the 'Aliens' in the 2002 science fiction movie "Signs"?

ItchyElf73751, of course clean water did Kill the wicked witch of the movie The Wizard of Oz

Loved the part when the kids were wearing the aluminum foil helmets.

But water is called the universal solvent.

wasn't that an M Night Shamalama movie?

ForgetfulLuck67700, how did these aliens not know the earth is mostly water?

Why complain about the plot of this M Night Shamalan movie? It's science fiction. I prefer to suspend my beliefs when watching movies so I can enjoy them rather than pick them apart for realism and facts (unless its a documentary). Watch a movie to escape reality instead of trying to analyze it. Sheesh

So it's hard to accept that water would kill aliens than that aliens have invaded Earth? BWAAHAAHAAHAAHAAA!

ForgetfulLuck67700, As a universal solvent, it really solved the alien problem for the family in the movie! lol 😉

elizabeth bennett, I loved the foil hats!

SQinfoNUTS, actually, it was mop bucket water.

C. C

ItchyElf73751, it dissolved JOHN WICK! lol

tomror, it's in the script

OptimisticFrog17914, Same problem in my town as well.

Player #326446, You're absolutely correct!

How the Heck does anybody know what might hurt them? They were Aliens from another world. Maybe they were made of salt, sugar or even dirt.

tystyx, It dissolved the Wick