Replying to Back spray from skis

Hey guys I am just wondering about back spray from twin tip skis. I get a very big amount of backspray from my skis to the point where I have to watch where I go because its like I shoot people when I go by and in front of them.

Could this be because I have bad form and I don't learn far enough ahead when skiing or something? Or is this mainly due to me being a bigger guy at 6'3 200lbs?

I'd really like to learn how to fix this if possible. I don't see any of the really good park guys spraying like I do, so I'm hoping its something i can fix.