Do you ever get a pale white film over your mono bags??? I usually keep my wapity out (not in its dust bag) because I take it with me everywhere. If I keep it in one place, it gets this white films on SOME parts of the canvas. Not everywehre, so it's not dust. And that only happens when it's out on my desk or bed...not in the bag. It can easily be wiped off though. The first time I saw it, I thought I would have a heart attack because it was still new! Has anyone ever heard/experienced that? It's just so weird!