To clean Low-E glass, gently scrub the wet area with a clean, lint-free towel or cloth, then wipe dry with another clean, lint-free towel or cloth, being careful not to use a squeegee on the coated interior surface.
Low-E (low-emissivity) glass has a special coating that helps improve energy efficiency by reflecting heat. While durable, this coating requires a specific cleaning approach, particularly on the interior surface where the coating is often applied. Using the wrong tools or techniques can damage the coating.
Step-by-Step Guide to Cleaning Low-E Glass
Cleaning your Low-E windows properly ensures their longevity and effectiveness. Always check which side of the glass has the Low-E coating (it's typically on the interior side for most windows).
Here are the steps based on proper handling of the coated surface:
- Prepare the Area: Start by removing any loose dust or debris from the glass surface with a soft brush or a dry cloth.
- Apply Cleaning Solution: Lightly mist the glass with a recommended glass cleaner or simply use clean water. Avoid using harsh chemicals, abrasive cleaners, or solvents, as these can damage the Low-E coating.
- Clean the Glass: Scrub the wet area with a clean, lint-free towel or cloth. Use gentle, circular motions to clean the entire surface.
- Dry the Glass: Wipe dry with a dry, clean lint free towel or cloth. Use a fresh, dry cloth to buff the surface until clean.
- Avoid Squeegees on Coated Surface: DO NOT USE A SQUEEGEE on the Low'E' coated (interior) surface. Squeegees can potentially scratch or damage the delicate coating over time. You can typically use a squeegee on the exterior, uncoated side, if preferred, but drying with a cloth is generally safer for the interior.
- Prevent Streaking: To prevent streaking, stop wiping when the glass is almost dry and there is a uniform film of moisture left on the glass surface. This remaining film will evaporate without leaving streaks.
Recommended Materials
- Clean, lint-free microfiber cloths or soft towels
- Clean water or a mild, non-abrasive glass cleaner (check manufacturer recommendations)
- Soft brush (optional, for dusting)
Important Considerations
- Always confirm which surface has the Low-E coating (usually the interior).
- Avoid using abrasive pads, steel wool, or razor blades.
- Clean spills or spots promptly to prevent them from setting.
- If unsure about a cleaning product, test it on a small, inconspicuous area first.
By following these steps and avoiding harsh methods, you can keep your Low-E glass clean and maintain its energy-saving performance.
