3AW's Big House & Double Glazed Windows.

Hi
You have found a common problem in single glazed Low-E - e.g. ComfortPlus, it is very difficult to clean, and you must adopt the supplier's method of cleaning. I have included their recommended cleaning procedure below.

Is the condensation forming on the glass? Are these double glazed (you mention argon, so I think so).

Yes, with rubber glazing (as distinct to silicone - as in EcoClassic), gaps exposed to air can form in the corners. These affect the air (and rain) leakage through the window, but should not affect the double glazing. Argon and low-E are detectable only by using a special instrument.
Ed



Hand Cleaning Viridian ComfortPlus™, SolTech™,
EnergyTech™ and Enviroshield Performance™ Glass
These glass products have a very thin coating on the interior glass surface. It
is this hard and durable coating which gives these products improved thermal
insulation and solar control performance compared to ordinary clear glass. The
coated surface of Viridian ComfortPlus™ SolTech™, EnergyTech™ and
Enviroshield Performance™ glass does clean differently to ordinary glass and
these guidelines are recommended for the most appropriate hand cleaning
results.
Routine Cleaning:
Hand cleaning of the coated (interior) surface, to visibly remove accumulated
dust or fingerprints, can be accomplished using a number of different glass
cleaning products.
The exterior surface of the glass is not coated so can be cleaned in the same
fashion as ordinary glass.
Recommended Routine Cleaning Products:
• Windex® Surface and Glass (clear liquid available from Supermarket), produced by
SC Johnson & Son Pty Ltd; or
• A mixture of one part vinegar with ten parts water.
In addition to the above products, commercially available vinegar-based glass
cleaners have generally demonstrated an ability to provide a clean, streak free
glass surface. Viridian does not recommend the use of ammonia-base and
alcohol-base glass cleaners because these products tend to leave visible
streaks.
Routine Cleaning Procedure:
• While cleaning ensure jewellery and watches are removed and gloves should be
worn.
• Flood the glass surface with the spray-on cleaning solution or with a
cloth saturated with the cleaning solution. Be generous with the amount
of solution applied.
• Scrub the wetted surface with a clean, lint free towel or cloth.
• Wipe dry with a dry, clean, lint free towel or cloth. Do not use a
squeegee on the coated (interior) surface.viridianglass.com
ABN 55 008 631 356
• To prevent streaking, stop wiping when the glass is almost dry and
there is a uniform film of moisture left on the glass surface. The film will
quickly evaporate leaving a clean surface.
Spot Cleaning:
Occasionally spot cleaning may be required to remove stubborn dirt or foreign
materials which adhere to the surface. Spot cleaning products work to remove
markings from grease, oil, tape adhesive, and crayons or other waxy materials
as well as paint and rub-off marks from plastics.
Recommended Spot Cleaning Products:
• Acetone (solvent available from hardware store) and must be used strictly in
accordance with manufacturer’s recommendations and warnings.
Spot Cleaning Procedure:
• While cleaning ensure jewellery and watches are removed and gloves should be
worn.
• Apply a small quantity of the cleaner listed above to a clean, wet cloth or towel.
• Rub on areas of glass needing spot cleaning.
• Wipe clean using a dry, clean, lint free towel or cloth followed by a routine cleaning
procedure.
Specialised Cleaning:
Do not use razor blades, steel wool, scouring bristles or other metallic or
abrasive objects on the coated surface. If metallic objects contact the coated
surface, a thin layer of metal removed from the object may be deposited onto
the surface which results in a discoloured stain which is difficult to remove
using normal cleaning procedures.
Recommended Specialised Cleaning Products:
• Hydrochloric Acid (available from hardware store).
Specialised Cleaning Procedure:
• While cleaning ensure jewellery and watches are removed and gloves should be
worn. viridianglass.com
ABN 55 008 631 356
• Carefully follow the chemical manufacturers use and safety instructions. If there are
none, pick a brand that has instructions and safety precautions or contact the
manufacturer before use or application.
• Apply a small quantity of the specialised cleaning product listed above to a wet, clean
cloth or towel. A cotton bud may be used for thin line type marks.
• Rub on areas of glass needing cleaning.
• Wipe clean using a dry, clean, lint free towel or cloth followed by a routine cleaning
procedure.
• Ensure that the cleaner does not come into contact with framing materials.
About This Cleaning Advice:
This information is offered as a general guide only and specific advice should always be
sought from a reputable glazier or professional window cleaner before undertaking any
cleaning. This guidance does not preclude the use of other methods, materials or equipment,
however the user should undertake careful evaluation and make suitable enquiries of the
suitability of alternative methods, materials or equipment, before using them.
Viridian has taken all reasonable care in producing this document, however Viridian makes no
representations or warranties, express or implied, as to the accuracy, reliability or
completeness of, and disclaims all liability, direct or indirect (and whether or not arising out of
the negligence, default or lack of care of Viridian for any loss or damage (whether foreseeable
or not)) suffered by the recipient or any other person arising out of, or in connection with, any
use or reliance by any of them on this document. Liability which cannot legally be excluded is
limited to the maximum extent possible.