Damar, let's chat here. :-)
Do you have a photon or are you using the htc one?
If you do have the one, has this issue occurred since day one?
Are you using a screen protector? I what about a case?
Are you rooted?
What carrier are you on?
Soft reset didn't fix it?
Cleaned off the sensor recently?
Do you have a lot of home screens/live wallpaper? Low memory?