screen far too sensitive?

New member here, first post.
I had my g4 several weeks ago (uk version). Great phone, however recently the screen seems far too sensitive. Sometimes apps or other features are activating on their own without me pressing on them.
I looked in the settings but havent found a way to resolve this. Can anyone offer any suggestions?

I have a hardware problem my power button does not work and has become very sensitive

So I was just playing my favorite game ingress one day and suddenly my phone went into a boot loop. I took out the battery and put it in but It would just not start properly then I searched on the internet that y was it happening it said that your power button has become sensitive now samsung service centers are saying u need to get the motherboard changed but I know that replacing the button will make it fine ( right now I took thw button out I mean the button which we press to turn off the screen but the motherboard button is still there.) So is there anything which I can do myself to repair it at home itself because samsung service centers are sayibg tha there is a problem in the software.

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.