Albags is absolutely spot on there. I haven't heard of a miracle cure.
If a unit has failed, it could be (read twice) due to one of two things, either a fault in manufacture, or a fault in the glazing. If it's a fault in the manufacture of the unit and it is still under guarantee the company should replace it free of charge. If it is a fault with the glazing of the unit, the glazier should replace it for you. I can't see how the seal can be broken, moisture taken out and then resealed. It doesn't make sense to me.......