Turntable dust cover cleaning

Howdy. I have an issue with my Sota turntable dust cover. Pretty much every day, I have to clean streaks off the cover. There is a very high amount of static. I do run a very small humidifier as well. I live in Colorado (very dry climate) and the problem is worse on very dry days. I use Sprayway glass cleaner which has no ammonia and is safe for plastic. I'm assuming the cover is either plastic or plexiglass.

Here's a photo of it - https://imgpile.com/images/G1MMZ8.jpg

Any ideas?

Thanks much !