Hey there! I’m Jeremiah Hickey, owner of On The Spot Window Cleaning, and I want to let you in on a game-changer for keeping windows spotless—purified water window washing.
I’ll be honest—switching to this method wasn’t easy for me. I mean, I’m known as one of the best squeegee slingers out there (seriously, I’ve got the trophies to prove it 😎). But once I saw how much better purified water was for my customers, I was hooked.
While we still use traditional soap-and-squeegee methods when needed, purified water cleaning is now our go-to for exterior windows and glass doors. And for good reason—it delivers crystal-clear, streak-free results every single time.
We use this method on some of the most exclusive homes in San Luis Obispo County, and after years in the industry, I can confidently say—nothing beats purified water window cleaning.
This is one of the biggest concerns I hear, and I totally get it. People worry we might be using high pressure that could damage their glass or window frames.
But here’s the deal—we don’t use high pressure at all. The purified water we use typically comes out at about 60 to 80 PSI—basically just regular tap pressure. For comparison, a pressure washer starts at 1,500 PSI and goes up to 4,000 PSI—huge difference, right?
Instead of blasting your windows, our specialized water-fed pole system gently rinses away dirt, salt, and grime. It’s safe, controlled, and way more effective than scrubbing with soap. We use jets that fan out the water for an even clean, or smaller jets to target tricky areas—but never high pressure that could cause damage.
That’s why luxury homeowners trust us to clean their windows without any risk to their property.
This is another big one. Sometimes, we’ll finish an entire home, and the windows will still be wet. Naturally, customers wonder—“Uh… did they forget to squeegee?”
Nope! That’s the beauty of purified water. Once we rinse off the dirt and debris, there are zero minerals left in the water. So even if the glass is wet when we leave, once it dries—it’ll be 100% spotless with no streaks or residue.
It’s actually better than traditional methods, because soap leaves behind a microscopic film that attracts dirt. Purified water? No residue, no problem.
Another reason I made the switch? Safety.
I've heard so many times—“Our last window cleaner used a 40-foot ladder to get up there!” But here’s the thing: ladders are one of the riskiest tools in our industry. And unfortunately, I learned that the hard way after taking a nasty fall.
That’s when I knew we had to switch things up. Now, using water-fed pole systems, we can clean even the highest windows safely from the ground. No more dangerous climbs, no unnecessary risks—just incredible results.
Most people don’t realize it, but rain is basically nature’s purified water. When it forms, it goes through a natural distillation process—evaporating from oceans, lakes, and rivers before condensing and falling back to earth. In its purest state, rainwater has no minerals or contaminants, just like the water we use for window cleaning.
Ever notice how after a heavy rain, your windows sometimes look cleaner? That’s because pure rainwater rinses away dirt without leaving behind mineral deposits. Rain makes windows look dirty is when it mixes with dust, pollen, or contaminants already on the glass; or if the water is dripping off of a dirty surface and on to your windows (when rain drips from an overhead tree, for instance.) If your windows were freshly cleaned with purified water, a good solid rain wouldn’t leave a mess—it would actually help keep them stay clean for longer.
This is exactly how our purified water window cleaning process works. After we agitate and loosen the dirt on the window, we rinse them just like a clean rain would—only in a controlled and thorough way. Since the water we use is completely free of minerals, when it dries, it leaves no streaks, no spots, just perfectly clear glass.
And here’s another thing—windows and glass doors are designed to withstand water. If they weren’t, every time it rained, they’d leak! So when we clean with purified water, we’re simply using a method that mimics nature’s own process. Your windows are built for it!
Of course, for any window cleaning method to be truly effective, your windows and doors should be properly maintained. A well-sealed window not only keeps water out but also provides important benefits for your home, such as:
🛑 Preventing Leaks – Proper weatherproofing ensures that rain, wind, and moisture stay outside where they belong.
🌡️ Better Insulation – Well-sealed windows help keep your home warm in the winter and cool in the summer, reducing energy costs.
🐜 Keeping Bugs Out – Gaps and worn seals around windows can be an open invitation for ants, spiders, and other unwanted guests.
💨 Blocking Drafts – A properly sealed window stops cold drafts from creeping in, keeping your home comfortable year-round.
Our purified water window cleaning system works flawlessly with well-maintained windows and doors. If your weatherproofing is in good shape, you’ll enjoy all the benefits of spotless, streak-free glass without any concerns about leaks or damage. As part of your home maintenance, it’s always a good idea to check and replace worn-out seals, caulking, and weather stripping so your windows stay in top shape for years to come.
Now, you might be wondering—what exactly makes purified water so special? Well, it's all about removing impurities that can leave behind streaks and spots. Here’s a quick breakdown of how we make sure the water we use is as pure as possible:
💧 Carbon Filtration – This step removes chlorine, organic compounds, and certain heavy metals, ensuring the water is not only pure but also safe for your windows and frames.
💧 Reverse Osmosis (RO) – This process forces water through a super-fine membrane, removing up to 99% of contaminants, including minerals, salts, and chemicals. Think of it as an ultra-fine sieve that catches all the gunk you don’t want on your windows.
💧 Deionization (DI) – Using ion exchange resins, this method removes all charged mineral ions (like calcium, magnesium, and sodium) that could leave behind white spots. It’s what gives our water that truly spot-free finish.
💧 UV Purification – Our truck mounted system also uses UV light to kill bacteria and viruses, making sure the water is microbiologically clean (though this isn't always necessary for window cleaning, it’s an extra level of purification for some applications).
Each of these steps ensures that by the time our water reaches your windows, it's as pure as possible—no minerals, no streaks, just perfectly clean glass.
Companies like Intel use ultra-pure water (UPW) to clean silicon wafers. Even microscopic impurities can ruin microchips.
Hospitals, labs, and pharmaceutical companies use purified water for drug formulation and sterilization.
Bottled water companies, breweries, and food processors rely on purified water to maintain taste and quality standards.
Power plants use purified water in cooling towers and steam generation to prevent scaling and improve efficiency.
Purified water is the gold standard for window cleaning. It removes dirt, salt, and deposits without leaving streaks or residues.
At On The Spot Window Cleaning, we’ve perfected purified water window cleaning. We serve luxury homeowners, businesses, and oceanfront properties throughout San Luis Obispo County—from the rolling vineyards of Edna Valley to the stunning estates of Shell Beach and The Bluffs.
Speaking of The Bluffs—I mentioned this in our latest video:
We’ve cleaned most of the homes in this exclusive gated community, and every single one gets the purified water treatment. It gets all the salt off, rinses everything down, and leaves windows looking flawless—no streaks, no spots.
If the homeowners with some of the best views on the Central Coast trust us with their windows, imagine what we can do for yours!
📲 Book your spotless window cleaning today!
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