Q: iPhone 6 Touch disease

This is a user to user support forum. You are not addressing Apple here. A search of the forum will produce results of others complaining about the issue. You can contact Apple, but there has not been an announcement of any action regarding this complaint.

Hi

If your wife has not yet done so, it may help to back up her iPhone (she may wish to encrypt the backup, if using iTunes), restore it to factory settings (with a fresh copy of iOS) and test whether the issue persists before restoring from backup:

• How to back up your iPhone, iPad, and iPod touch - Apple Support
• Use iTunes on your Mac or PC to restore your iPhone, iPad, or iPod to factory settings - Apple Support
• Restore your iPhone, iPad, or iPod touch from a backup - Apple Support

The steps here may also help:

• If the screen on your iPhone, iPad, or iPod touch doesn't respond to touch - Apple Support

If the issue persists - or if she prefers to skip straight to this step - I suggest that she contacts Apple Support (mail-in service may be available) or makes a Genius Bar reservation with a view to having her iPhone checked and, if recommended by Apple, serviced (potentially via chargeable repair service):

• Contact - Official Apple Support
• https://twitter.com/applesupport
• http://www.apple.com/retail/geniusbar/

Apple is not acknowledging this issue and apparently some of the threads posted on this forum found using various search engines have been removed.

Regrettably This link does not offer a fix for this specific issue as it is not a screen issue, it is an issue with a flaw in chipset responsible for all touch screen interaction.

best of luck.