Double Glazing Unit Repair If You have double glazing that appears misty or cloudy and isn't able to be cleaned, it's probably "blown". This occurs when the gap between the panes of glass expands due to the deterioration of the window seals. Replacing the gasket seals on your windows will http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=1209989