Liquid, it's Bad

I was chatting with some of the other techs about liquid damage - one
of them was telling a story about a customer who admitted he'd fallen
into the sea, and when he checked the phone, there was just a tiny bit
of corrosion on one component, talk about luck. So I wanted to know
what was causing the massive entire-board-looks-fuzzy corrosion on
some phones.

"Steam." they said. "Gets everywhere in the phone."
"Eh? How do you...?" I asked in confusion.
"People take their phones into the bathroom. While they shower." they
said in wise disgust.
"They what." I reply, my opinion of the average IQ dropping.

Then Laslo started into a story about having bought his girlfriend a
new iphone, and coming home to find her singing in the steam-filled
shower with the phone playing music on the toilet tank. It was only a
month old! he informed us, with appropriate gestures. He did a very
comic version of his reaction - "THIS WAS FIVE HUNDRED POUNDS!!!",
miming shaking the phone in the air "...get out." They are still
together, so one assumes he eventually forgave her and she hasn't done
it again.

Steam + Phones = BADBADBAD

Then I heard the story about the customer who'd put his phone into the
microwave...