Replying to Weird shit that apperas on my base's

So whenever i ski at my hill my invaders (this yrs 08/09) I get this really weird white shit on the bases of my skis. It is usually near the edges and it goes up and down my skis. At first glance you would think that the bases are just dried out because that's almost exactly what it looks like; but you can literally scrape the shit off, all i do is take an SOS pad and it comes right off, but after a few hours of skiing it comes right back.

I went to my shop and they said it from some chemical based lubricant that my hill uses in their snow guns (I live in the Midwest so our entire base/snow is made up of entirely man made snow). I am pretty sure that is what is causing it because I skied at entire week in Tahoe and had no problems, but as soon as i came back here the problem aroused again.

I am pretty sure that this shit is causing my skis to slow down; because even after a fresh coat of wax my skis I still can barley clear the smallest jumps at my hill. So I am wondering has anyone else had this problem, and know any solutions. I know i can just scrape it off, but i am looking for a better solution. Also i am pretty sure this problem is just isolated with invaders; cause none of my friends who have other line skis have this problem.

Thanks