(A customer brings his laptop in to be fixed.)

Customer: “It won’t turn on.”

(I plug it in, and press the power button, doesn’t work. I flip it over to make sure the battery is locked into place and see rust/corrosion all over the battery.)

Me: “Whoa! We can’t fix this. It isn’t safe. What happened to it?”

Customer: “It got hot, so I put water on it.”