I don't think it's the headlight area. Usually on my sleds the snow was getting in around the side intakes, right between the hood and the cheap foam AC uses to seal the airbox. I also duct tape the joint where the airbox halves join. Everything else is sealed.
It's one of my must things to do before riding since the M7's. Never had the deep powder bog or water in the airbox since.
I just cut a triangle piece of open cell foam (like humidifier foam), pull the rubber o-rings and couple of bolts to pry the airbox back, shove it in till it covers the side holes completly leaving the cheap foam there, and put it back together.
I actually pull the aluminum shield that AC put in to stop the headlight from melting out from under there and strip out the foam in the headlight area to let some cool air in under the hood and it leaves via the hole made by the much needed, homemade, hood lift bracket that's been on every one of my M-sleds since '06.
You do that stuff and you'll never have a snow ingestion or heat melting things issue again.
IMHO, LOL.