See how to properly clean windows subject to hard water scale.

1. Window Cleaning
July 14, 2014
←Unit 3A – test site

2. Tim Bowman divides window in two halves by
placing tape on inside, thus making the
committee’s comparison easier

3. Left side of 3A Test Window
Received the enhanced cleaning
Step 1 = Use brush to remove surface dust and
apply 1st liquid softener/cleaner

4. Left side of 3A Test Window
Received the enhanced cleaning
Step 2 = Moisten window
with 2nd proprietary grim-
cutting spray, wait 2 to 3
minutes for it to soften
grim and mineral deposit
stains

5. Left side of 3A Test Window
Step 3 = Use 0000 steel
wool to 1st remove
surface salts from
window, follow with
clean white heavy paper
to dry glass drying

6. Left side of 3A Test Window
Step 4 = Cream polish is
applied to dried window,
and rubbed in with a damp
sponge, to remove
more remaining mineral
deposits; excess polish is
removed with squeegee
and clean rags

7. Left side of 3A Test Window
Step 5 = The ultra-fine
steel wool is again used ,
combined with some
cream to create and ultra
smooth surface and clean
rags

8. Left side of 3A Test Window
Step 6 = Rest of polish is removed with squeegee, and
frame is dried off leaving spot-free glass

9. Right side of 3A Test Window
Received the regular cleaning
Step 1 = Use brush to
remove surface dust

10. Right side of 3A Test Window
Step 2 = Use wet trowel cloth to remove surface dirt
and then squegee dry

11. Final Appearance as Viewed from inside
“Enhanced-cleaned” side was brilliantly clean with
outside colors being much more vivid
↑This side panel
was left uncleaned
↑Sharp, brilliant
greens and
blues found here
Mineral deposits
evident on this glass
pane, tree/sky colors
were “washed
out”→

12. Conclusions and Action Required
• The enhanced window cleaning required about 10
minutes vs. about two minutes for the regular cleaning
• Additional cleaning attention was required along the
bottom four inches of the window due to splashing
from its ledge.
• The committee members are invited to view the
difference themselves to be better able to vote on that
$12,000 additional expense and the value it delivers
• The rep indicated that the enhanced cleaning’s benefit
could last as long four years