trackpad always makes hands clammy/sweaty

I have a new 13" macbook air 2011. I got it about 2 months ago. I LOVE it, but i find that not only does my left hand get cramps in it from using the trackpad so much but I also find that my fingers don't glide that smoothly up and down on the trackpad. Every time i touch the trackpad I can see a little finger mark show up which indicates my hands are sweaty/clammy. If i wipe them off and come back it works for a few minutes and then starts again. I don't have sweaty or clammy hands by nature so this is reallly strange. Anyone eelse have this problem? I have tried cleaning the trackpad and entire computer with iKlear but it didn't solve the problem. I hate to go out and buy a bulky lapdesk and mouse to use with such a lightweight air!

thanks!