Double Glazing Unit Repair Double Glazing that is hazy or cloudy, or that is not able to be cleaned has likely been "blown". This happens when the seals on the windows break and the gap between the panes of glass opens. Replacing the gasket seals on your windows will correct https://telegra.ph/What-Is-Double-Glazing-Repair-Near-Me-And-Why-Is-Everyone-Talking-About-It-02-05