Q: How do I remove fingerprints, including old ones, from a flat-screen TV? A: Back when the only screens in most homes were televisions that showed images projected from the back via cathode-ray ...

General Motors is working on self-cleaning touchscreen technology that will clean up fingerprints ... would be invisible to the human eye so as not to affect the colors and images seen on the screen.

We spend so much time attached to our phones, tablets and laptops that it's no wonder that we leave our grubby fingerprints all over them - but how do you remove the smudges? If you're wondering ...