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The exterior had the usual accumulation you'd expect - dust, water spots, and ground-level buildup coating the lower panes pretty heavily. Inside, the window sills had their own story to tell. Mineral deposits and dried splash marks had been sitting there long enough to really settle in. Not a quick wipe situation at all.
We handled both the interior and exterior glass on this one. That's the only way to really do it right. You can clean the outside all day, but if the inside is hazy or the sills are grimy, the results still fall short. Doing both sides means the glass is actually clear - not just cleaner on one face.
For a business, this stuff matters more than people realize. Customers form an impression the second they pull into the parking lot or walk through the front door. Clean windows signal that the business takes care of its space. They also make a real difference for the people working inside - natural light hits differently when the glass isn't fighting it.
The corner office rooms with wraparound windows are a good example of why this work pays off. Strip away the dirt and you've got unobstructed views of palm trees and blue sky. That's a completely different environment to work in. Same building, same windows - just actually clean.