Smartphones pick up significant dirt and bacteria through daily use, with studies suggesting the average handset is around 10 times dirtier than a toilet seat, making regular cleaning important. However, harsh products such as Windex, compressed air, hydrogen peroxide or bleach should be avoided, as they can strip the oleophobic coating on the screen, permanently damaging its fingerprint-resistant, oil-repelling properties.

The recommended method is to power off the phone, remove any case, and gently wipe the screen and back glass with a damp (not wet) lint-free microfiber cloth, using either soapy water or a 70 percent isopropyl alcohol solution. Cases should be cleaned similarly if made of silicone or plastic, though leather cases should only be wiped with mild soap and water, as alcohol can dry out and crack the material. Common mistakes to avoid include applying liquid directly to the device, cleaning while it's plugged in, over-using alcohol wipes, and using rough fabric or paper towels, all of which risk water damage or surface scratches.