Know thy screen. Find out if your phone’s screen features a soil-resistant coating. If so, use a dry cloth to clean. Otherwise, use “a slightly dampened microfiber or lens-cleaning cloth.” Avoid soaps or cleansers.
Get in the crevices. Treat handhelds as you would a computer keyboard. Remove dirt using either a can of compressed air or a small brush, “like a baby’s toothbrush.” If keys remain sticky, try a premoistened electronics-cleaning wipe and work it into crevices with a fingernail or a toothpick.
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