A user complains that their workspace is covered with debris and crumbs and that their keyboard's keys occasionally stick or produce a crunching sound. What should be used first to clean this keyboard?

The first course of action should be to quickly blow out the crumbs and debris with a few quick blasts of compressed air. If that first solution fails, demineralized water should be used to remove any spills off a keyboard. It will take several days to dry the keyboard when you use demineralized water, so you shouldn't use the keyboard until it is dry.