iPhones are precisely made machines, so in the process of figuring out how to fix a cracked iPhone screen yourself, you run the risk of doing even more damage. That's why you should usually let a professional look at it. Your standard iPhone warranty doesn't cover accidental damage to the screen, so if your iPhone screen is cracked, you'll be paying for the repair one way or another. Using a screen repair business not officially affiliated with Apple may be cheaper, but can also void your iPhone warranty, so think carefully before handing it over to a repair store. iPhone screens are made of glass, and when broken can create dangerous shards and sharp edges, so don't put off repairing a broken screen. Visit Business Insider's homepage for more stories . Recently, I was jogging from my car to a pizza shop to pick up dinner for the family, carrying my keys and iPhone in one hand, while digging through my wallet for cash with the other, not being careful with either. In the midst of jostling the items about, my venerable iPhone 6 took a dive and hit the edge of the curb screen-first.