It is a 2 part process:
Part 1 – Each window takes an average of 20 minutes to 1 hour. First, we drill 2 small holes in the outside pane of glass. Then we spray in and extract a cleaning solution, followed by a drying (rinsing) solution. At the end, we put in a mesh fabric to allow the window to continue to breathe and expel the moisture.
Part 2 – It takes about a month for the window to expel about 80% of the moisture. At that point, we return to remove the mesh fabric and install UV resistant vents over the holes. After the vents have been installed, the remaining moisture will continue to be expelled. You may notice refogging with temperature fluctuation, but it will be less each time and eventually, it will disappear completely.