It feels impossible to avoid in the touch screen era on any device. I also have a very small speck on the edge, I live with it. I play 90% docked anywaysGot my screen protector today.
Applied the screen protector almost perfectly, but noticed a tiny speck must have slipped underneath when applying. I can only notice it slightly on white backgrounds when navigating through the menu. Was careful to follow the instructions, but things happen. When playing a game or when docked, I won't notice it at all. Waiting for Mario Kart World to download now.