I was looking around on snopes, and I found this story: http://www.snopes.com/science/saltwatr.htm

It claims that vending machines are now impossible to salt. That is, vending machines made after 1994/1995 can't be salted. You can still do it to the old ones. It says they made the coin channel longer and perforated. How big are these perforations? Maybe, if you put a whole lot of salt water in, it will work.

Maybe if you put a little hose on the end of your salt water spraying device, you could stick it up to the perforations or down the slot and squirt while you move it around, eventually hitting the circuit that messes up, and making it spit coins. I'm sure you could aim the spray with the little hose, and fuck that thing up.

Wait, so the saltwater trick no longer works? Well, that's most certainly /not something this board has known for longer than you've been using it/.

Hint: That was sarcasm.

Me and my freind did this at the school last year and it didnt work. It didnt spit out coin or anything like that but it did fuck them up. I think it was like $9000 in damages. They were brand new too.