The proper repair for a cracked iPhone 6 screen, touch screen problems, or damaged LCD is a iPhone 6 screen replacement. The cost to repair your iPhone 6 screen is listed below and includes the replacement part, labor, and a 90 day warranty.
How To Tell If You Need A Screen Replacement For Your iPhone 6.
Glass Touch Screen: If the top touch screen (glass top) is cracked or broken with shattered glass, or your iPhone 6 has a non responsive touch screen, but the image under it is fine.
Complete Screen with Touch Panel and LCD: If the top touch screen (glass top) is cracked or broken with shattered glass, and the LCD image is dim, has black spots, lines, or white spots
LCD Only: If you do not see anything when your iPhone 6 is on, or if you do and the screen display is dim, has black spots, lines, or white spots, then you probably have a damaged LCD.
Special notice for iPhone 6 owners seeking Home Button repair services:
The iPhone 6 has Touch ID security within the home button. The home button ribbon cable is exclusive to each device, and if replaced, will not provide Touch ID functionality. Replacement of the home button on the iPhone 6 will remove Touch ID functionality but will provide home button functionality.
iPlayPower will not be held responsible for broken iPhone 6 devices with torn or damaged Home Button security ribbons.
Make sure you iPhone shows up when connected to iTunes or you may have other issues.
Since your checking your charging port, consider backing up your iPhone in iTunes before bringing it in. Better safe than sorry.