Window CleaningJuly 14, 2014

←Unit 3A – test site

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

Left side of 3A Test WindowReceived the enhanced cleaning

Step 1 = Use brush to remove surface dust and apply 1st liquid softener/cleaner

Left side of 3A Test WindowReceived 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

Left side of 3A Test WindowStep 3 = Use 0000 steel wool to 1st remove surface salts from

window, follow with clean white heavy paper to dry glass drying

Left side of 3A Test WindowStep 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

Left side of 3A Test WindowStep 5 = The ultra-fine steel wool is again used , combined with some cream to create and ultra

smooth surface and clean rags

Left side of 3A Test WindowStep 6 = Rest of polish is removed with squeegee,

and frame is dried off leaving spot-free glass

←Optical difference between left and right half

of window began to become evident→

Right side of 3A Test WindowReceived the regular cleaning

Step 1 = Use brush to remove surface dust

Right side of 3A Test WindowStep 2 = Use wet trowel cloth to remove surface dirt and then squegee

dry

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”→

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