When was the last time you turned your phone off...like all the way off?
It is important to do this at least once a week.
I know, it's not cool to have to do it, but you are carrying around a computer in your pocket. It is doing more processing than you think and honestly...it needs a break every once and awhile.
So take a moment each week to power your phone all the way down, let it be off for a minute, then boot it back up. You may find that it helps fix those minor "glitches" you've noticed and just pushed aside, it may help speed up it's performance. But what it will do for your phone is invaluable.