Your computer, printer, fax machine, and other home office gear will work better if you keep them clean and dust-free. Before you start cleaning, make sure that all your equipment is shut off. Now mix equal parts white vinegar and water in a bucket. Dampen a clean cloth in the solution — never use a spray bottle; you don’t want to get liquid on the circuits inside — then squeeze it out as hard as you can, and start wiping. Keep a few cotton swabs on hand for getting to the buildups in tight spaces (like around the keys of your keyboard).