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Eating at your desk is a bad habit, not just because it deprives you of a much-needed midday break — little crumbs end up falling from your sandwich and wedging themselves underneath keys andthensuddenlythespacebarquitsworking.
First, if it's not wireless, unplug it. Hold it upside down over a trash can (or outside) and shake to get any loose crumbs and debris out. It helps if you play this in the background. You can also use a soft bristled brush, like an old toothbrush, to brush off dust and debris from the edges of keys.
Next, head back to your desk and wipe the keys down with a disinfectant wipe (you don't want to spray cleaner directly onto the keyboard itself). If you really want to get nitty-gritty, you can use a Q-tip dowsed in rubbing alcohol to swab keys and the spaces between keys. Some folks recommend running a dry Magic Eraser across the keyboard, and that does a good job.
That's your basic cleaning. If keys are really sticking, though, you'll want to remove the keys, too. Use a coin or fingernail to pry one corner upward; move to an adjacent corner; peel it off. You can then used a can of compressed air and/or an alcohol-soaked Q-tip to get out all the crumbs and gunk. If you remove all the keys, you can then clean them all together in a large plastic bag with some dishwashing soap. Shake the keys inside for a few minutes to wash them off, then carefully empty the water from the bag and rinse the keys clean. (Alternatively, you can run them through the dishwasher.) Dry them thoroughly with a paper towel before returning them to their proper places on the keyboard, pressing each down into place with your finger.
Fingerprints and food grease can leave your phone screen sticky and smudged. For a basic clean, use a microfiber cloth (the kind you might get at the optometrist's office along with a pair of glasses) and rub it gently until all those prints are wiped clean.
That should suffice, but if you've got some stubborn goop on there, power the phone down and spray the cloth with either distilled water, half water and half white vinegar, or a dedicated smartphone cleaning spray. Then, wipe the screen down with the moist cloth. When the display is dry, switch the phone back on.
You don't want to use paper, paper towels, or more abrasive cloths to wipe the screen because it could cause tiny (or not so tiny) scratches.
Many new smartphones use super-tough materials such as sapphire crystal as their lens covers. This makes them far more resistant to scratches, but you still want to clean your lens cover carefully. If it's got some dust or dirt, gently wipe a microfiber cloth across the lens to remove it. If you need more intense cleaning than that, spray the cloth with a half water, half rubbing alcohol mix and wipe again, or use a lens cleaner.
For a notebook, you've got the joy of cleaning both a keyboard and a display.
First, you want to shut down and unplug the computer. Next, use a damp, lint-free cloth to wipe the exterior clean. For the screen, use a dry microfiber cloth or a water-moistened lint-free cloth to wipe the display clean. For a light keyboard cleaning, you can continue to use a moist cloth to wipe the keyboard area clean. Use a Q-tip to scrub between keys, and a toothpick if you've got any visible crumbs wedged around keys.
Have you ever cleaned your remote control before? Er, yeah, us either. To clean it off and kill germs, use a similar technique to cleaning a desktop keyboard. Dampen a Q-tip with rubbing alcohol and swipe it clean. If there's gunk in crevices, a toothpick can help push it out.