Is it possible to restore a double glazing?

Double-glazed windows are in great demand because of their efficiency, accessibility and durability.

Although they are able to serve for decades, the resource gradually decreases and it is necessary to resort to the maintenance of the structure. The bottom line is that such double-glazed windows consist of two glasses, between which there is a sealed space. It is filled with inert gas. Argon is most commonly used, since it is one of the most affordable inert gases with the necessary properties. Thermal conductivity increases significantly from the use of such glass, so they have become popular around the world. In comparison with the budget single glasses, double glazed windows are much more efficient to use.

source http://argowindowrepair.com/blog/is-it-possible-to-restore-a-double-glazing.html