Purified Water Window Cleaning: Why It Leaves No Streaks
By Stephen Cain, Purified Wash ยท April 16, 2026
Purified water window cleaning uses deionized water with the minerals and dissolved solids removed, so nothing is left on the glass when it dries. With no soap film and no mineral spots, windows dry streak-free and tend to stay cleaner longer between visits.
- Streaks come from minerals in tap water and soap film left on the glass.
- Purified, deionized water dries with nothing left behind, so windows stay cleaner longer.
- Water fed poles reach about 40 feet, and screens, frames, sills and tracks are included.
Why do windows streak after a normal cleaning?
If your windows have ever dried with streaks or spots after a cleaning, the cause was almost certainly the water. Tap water carries dissolved minerals like calcium and magnesium, and those minerals stay on the glass after the water evaporates.
Soap adds its own layer of residue. Together, the minerals and soap film dry into the haze, spots and streaks most homeowners know too well.
The problem usually shows up on a sunny afternoon, when low light hits the glass and every streak and spot stands out. Wiping harder with tap water and household cleaner tends to spread the residue around.
What is purified water window cleaning?
Purified water window cleaning starts with water that has been run through filtration and deionization, which strips out the minerals and dissolved solids. When water that pure dries on glass, there is nothing left in it to leave a mark.
Because the water itself does the rinsing, we use no soap on your windows. The glass dries on its own, clear, with no towel marks and no film.
Taking the minerals out of the water removes the cause of streaking at the source. When the water dries, the glass is simply clean.
How does Purified Wash clean windows with purified water?
We clean with water fed poles that reach about 40 feet from the ground, so most homes need no ladders at all. The brush scrubs the glass and the window assembly, then a purified water rinse carries the dirt away.
Since no soap goes on the glass, there is nothing left to drip onto sills or siding after we leave, and nothing for the sun to bake onto the window.
- Exterior glass cleaned with purified, deionized water and no soap
- Screens, frames, sills and tracks included with every window cleaning
- Interior glass available as an add on, done by hand
- Upper story windows reached from the ground on most homes
Why do windows stay cleaner longer with purified water?
Soap and minerals leave a slightly sticky surface behind, and dust and pollen cling to it. After a purified water clean there is no residue on the glass, so dirt has a harder time bonding to it.
In practice that means your windows look clean for longer between professional cleanings than they would after a soap and tap water job.
It also means each cleaning starts from a cleaner surface, since less buildup has had a chance to settle on the glass between visits.
How often should you schedule purified water window cleaning?
Most homeowners do well with window cleaning two to four times per year. Our Biannual and Triannual window cleaning plans take money off every visit, and the No Spots Promise means any spots or streaks reported within 48 hours are redone free.
Homes near Lake Erie or under heavy tree cover usually need the higher end of that range, since moisture, pollen and organic buildup land on the glass faster.
We bring purified water window cleaning to homes across Cleveland's west side, including Rocky River, Westlake, Bay Village, Avon Lake, North Olmsted, Fairview Park and Lakewood. Book a free in-person quote online or text (440) 865-8993, and we will come out, look at the property and give you an exact price, often doing the work on the same visit.
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Common questions
01What is purified water window cleaning?
It is window cleaning done with deionized water that has had its minerals and dissolved solids removed. The water dries without leaving residue, so the glass comes out streak-free.
02Why do my windows streak after I clean them myself?
Streaks usually come from minerals in tap water and from soap residue. Both stay on the glass after the water dries.
03Do you use soap on the windows?
No. We clean the glass with purified water only, which rinses clean and leaves no film behind.
04How often should windows be cleaned?
Most homes benefit from two to four cleanings a year. A Biannual or Triannual plan takes money off every visit.