I have so many electronics that show fingerprints very easily that i sometimes carry a microfiber cloth, it’s either in my bag or on my desk. My phone in particular needs to be polished with the microfiber cloth once a week or so otherwise it looks like a big greasy smudge. i also use it for cleaning my sunglasses or wiping down anything else that can use a quick polish. got this one for i think $6 at best buy in the camera department. worth it for cleaning my sunglasses alone as it wont scratch the lenses.