My keyboard has got crap underneath it

try wearing pants

^ superb

reported

undo the case , remove the keyboard , clean , replace , screw the case back together

turn upside down, shake and hit the back of it and watch all the cr@p fall out..hoover with the small attachment works well too

Somebody on here got a miniature Henry vac cleaner for his desktop, search for crap presents thread.

I got a miniature HENRY hoover for Christmas, would you like to borrow it ? , you could try using your house Hoover , but i did this once and lost a few keys from the keyboard.

Buy a can of air and spray all the shiit out from under the keys.
Move your sandwiches to a safe distance, unless you want co-workers dead skin and fingernails in them :(