I noticed my iPhone 6 compared to a friends would absorb way more smudges and finger prints. I remember using vinegar spray to clean my screen few weeks ago because I thought it would help remove the fingerprints. I then googled it and read it removes the oleophobic coating, making the smudges more apparent compared to my friends same iPhone. What do I do to get that coating back, am I screwed? I also need to make a genius appointment because my home screen button clicks like there is something behind it. Maybe they can replace the phone.