Ah, our computer keyboard — we pound on it for hours with Cheetos-stained fingertips, yet we never give a thought to cleaning it properly. But we should. Let's face it: Grimy keyboards are disgusting.

If you spend most of your day typing, your mechanical keyboard is probably filthy. Crumbs from snacks eaten at your desk, dust, pet hair, dead skin cells, and oils from your fingers all accumulate ...