Home button is too sensitive.

Hi all,
It seems my home button is way too sensitive, it sometimes(I say sometimes because it seems to vary) senses a touch from up to 3-5mm away from the screen. This becomes problematic because since it's range is so big, it can pick a normal press as a long-press or even seem to be pressing by itself and it's pretty annoying. Is there a way to lower/calibrate it's sensitivity or even better, to move the "hold" functionality to the back or HTC button?

This wouldn't have bothered me and I haven't even noticed it until I made a very favorable (for me) exchange with some guy and he calls me the next morning to tell me I tricked him because I gave him a faulty phone and the button presses itself, so I had to tell him I'll look at the phone and try to see what the problem is and if I can fix it by tomorrow, so any help would be appreciated!

Also, the guy said in 2 instances he put the phone down and it kept pressing itself, I haven't found anything similar about the M7 on the internet and neither did this happen to me in 6 months of owning the phone, but it somehow happened to him twice in a few hours.