How do I stop my BLU VIVO XL2 phone from detecting ghost touches?

This happens more when the phone is charging, but also happens sometimes when it is not....but the touchscreen seems possessed when I'm using it.

I would select one thing and I would feel the phone vibrate several times and it would eventually select something else above or below whatever I originally wanted to select. It happens on any website, while using any online or offline app, and on the home screen.

I've turned on the option to make my touches visible, and noticed that my phone detects three different touches in rapid fire secession (on the point I select, one inch above, and one inch below).

Any useful solutions would be greatly appreciated.

BLU Vivo XL2, no visible external damages, no screen cracks, all original manufacturer parts, no software mods.