It’s easy to ignore a dusty or smudged computer screen—until the glare from a nearby window makes every fingerprint and dust particle impossible to overlook.

If the home screen of your Android smartphone appears blurry or out of focus, here are a few things you can try before you take it to a technician for repair.

If your iPhone home screen is blurry, and you've just cleaned your glasses, there are a few things you can try to clear it up. Here's what to do.