All of these tips are from Daniel Johnson of The Telegraph. Articles like this one are written by authors who haven’t actually tried these tips on their devices. They don’t understand how these methods actually work — if they did, they wouldn’t be spreading bad news.
One good tip is to replace the damaged display
We previously covered replacing a damaged touchscreen display ourselves.
Let’s start with the most obviously crazy advice. What exactly does sandpaper do? Grinds over the surface, removing material. For example, you can use sandpaper to remove a layer of old paint from furniture. If you used sandpaper to erase a scratch on a wooden chair, it would erase the scratch by sanding all the material around the scratch until everything else lines up with the scratch.
So if there is a scratch on your screen and you start sanding, you are not fixing your screen. You are really scratching your entire display. Even if you use ultra-fine sandpaper, you are removing an important layer of coating. You’re better off living with a few scratches than scratching the entire surface of your screen.
«Turtle wax and other oils and creams»
The author correctly notes that using Turtle Wax will remove the oleophobic coating on modern touchscreen devices. Oleophobic Coating is an oil-repellent coating that repels oils on your fingers and helps reduce unsightly smudges. Removing the cover means your phone will pick up more oil and smudges.
So how do Turtle Wax and other «scratch repair kits» designed for cars work? Most of these scratch repair kits are for metal and paintwork, even glass windshields or car windows! Turtle Wax does offer an «intense glass polishing cream» that «uses ultra-fine particles to remove stubborn dirt, light scratches and cloudy windshield wipers.» In other words, Turtle Wax and similar products work by removing the top layer of your phone’s touch display. It’s basically the same as using sandpaper.