Proper care of today's window glass systems is easy, but very important. Insulated glass systems and those with Low-E can be damaged or lose their effectiveness through improper care.

• If possible, avoid washing windows in direct sunlight.
• Use a mixture of mild dish-soap and water to gently clean the glass. Rinse thoroughly with clean water and dry wish a soft absorbent cloth to avoid spotting.
• Never use abrasive or caustic cleaners as they may damage the glass or the finish.
• Never use petroleum based solvents or chemicals on the glass as they may damage the insulating glass or seal or component parts of the window.
• Never use a high-pressure spray to wash the windows as it may damage the insulating glass seal.
• Never use sharp instruments or abrasive pads to clean the glass.
• Never attach anything to the glass such as masking tape as heat from the sun may bake the adhesive into the glass.
• Remove the screens and wash them with a soft brush on a flat surface with mild dish-soap and water. Rince, wipe dry and re-install.

Article from: Atrium Windows.