Just last summer i spilled a bowl of popcorn on my PC. It might not seem that bad, but I LOVE salt! (It will probably be the end of me). As you can imagine this bowl of popcorn was crammed with salt, the bowl fell over, and salt fell inside my PC through venting holes, being sucked into fans and thrown everywhere into every little corner of my case.
Thankfully I managed to clean it all away, at least most of it. After that I din't think more of it. After about 2 weeks, there were some salt remains still inside my PC, it seems the salt had been eroding on my motherboard at the feet of the PCIe slot, causing it to simply die. Therefore i had to RMA the motherboard, and got a new one a couple of days later.