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Why purified water

The spots are minerals, not dirt.

San Diego tap water carries a heavy dissolved mineral load. When it dries on glass the water evaporates and the minerals stay behind - that is what a water spot is, and it is why rinsing a window with a hose can leave it looking worse than before.

Deionized water has had that mineral content stripped out. It lifts dirt more readily than mineral-loaded water, then evaporates and leaves nothing behind. That is what makes a spot-free finish possible without wiping the glass dry, and no wiping means no lint and no towel streaks.

Spotless window glass reflecting blue sky above a red tile sill on a San Diego home

Free quote, no pressure

Let's get your glass sorted.

Tell us what you have and we'll give you an honest answer on what's worth doing. If something doesn't need cleaning yet, we'll say so.

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