*Now at work, I normally eat lunch (usually a bread roll or similar) at my desk whilst browsing certain flying-related websites , resulting in a weekly 'turn the keyboard upside down and bang several times on desk' routine, which results in a mix of bread crumbs, sesame seeds and poppy seeds being expelled from the recesses of the keyboard! They're quite resilient, those keyboards!
Keyboard spice!
I'm too paranoid to use a public terminal unless I absolutely have to for some reason - I mostly just use my laptop instead. If I spill food or drink, it's therefore entirely my problem to deal with.