This ^^^
Black tape or blue painters tape. As said above, you should be focusing on a specific small spot on the target where you want the bullet to hit. If you are focused on a small spot while your red dot has tape on it, you will be able to see the dot and the spot you are looking at. If you can't see the small spot, then you most likely are staring at the dot. When shooting, eyes move to spot then bring gun to that spot. Join the PSTG group for tons of good info.