I have one myself. Tried everywhere to get it cleaned and adjusted but they won't touch it because they can't get the parts.
At least it doesn't owe you anything.
Well I did send it off to Midwest last week, they indicated they could do a clean and check and possibly resolve the fog issue. They also said that if certain parts were required they likely would not have them and repair would not be possible. If that's the case I guess I'll just be out the postage.
I have yet to hear back from them on the verdict, I will keep you posted.