Cloudy Shower Glass in Toronto: Hard-Water Deposits or Etching?
If the cloudiness nearly disappears when the glass is wet, it's mineral deposits sitting on the surface, and an acidic cleaner will remove it. If the haze stays visible wet or dry and the glass feels smooth but dull, the surface has been etched. Etching is permanent damage that cleaning can't reverse; a badly etched panel is usually replaced on its own, made to fit your existing hinges, rather than replacing the whole enclosure.
The City of Toronto's 2024 testing found tap-water hardness averaging 121 mg/L as calcium carbonate, ranging from 116 to 131 mg/L across 111 samples.
The wet test is the quickest check. Deposits almost vanish when the glass is wet, while etching stays visible wet or dry.
Vinegar and other acidic cleaners remove deposits but do nothing for etching. Never mix an acidic cleaner with bleach.
Severely etched glass can't be restored economically. The usual fix is a replacement panel, not a new enclosure: tempered or laminated safety glass made to your existing hole pattern.
Squeegeeing after every shower and running the fan for 20 minutes or more prevents most build-up.
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Cloudy shower glass is one of two things. Mineral deposits sit on top of the glass, nearly disappear when the glass is wet, and come off with an acidic cleaner. Etching is damage to the glass surface itself. It stays visible wet or dry, feels smooth but looks dull, and no cleaner will reverse it.
Telling them apart before you start scrubbing saves time, money and sometimes the glass. Deposits are a cleaning job. Etching is a decision about living with it or replacing the panel.
How hard is Toronto's water?
Moderately hard. The City of Toronto's own 2024 drinking water analysis reports hardness averaging 121 mg/L as calcium carbonate, ranging from 116 to 131 mg/L across 111 samples, with calcium averaging 33.9 mg/L. That level counts as moderately hard.
That's worth knowing because many hardness figures online trace back to water-treatment vendors rather than to municipal testing. If you're in Peel or York Region, check your own municipality's annual water report. Supplies there aren't the same as Toronto's.
At 121 mg/L, every litre of water left to dry on the glass leaves minerals behind. Do that daily for a few years, particularly on the lower third of the door where water runs down and pools, and the film builds up.
Deposits or etching? Three quick tests
| Test | Mineral deposits | Etching |
|---|---|---|
| Wet test: spray the cloudy area with water | Haze nearly disappears while wet | Haze stays visible, wet or dry |
| Touch test: run a clean fingertip over it | Gritty, slightly raised, often crusty near the bottom | Smooth, but the glass looks dull |
| Look at an angle in good light | White spots, drip lines, crust along the sweep | Sometimes a faint oil-slick rainbow, a sign of corrosion rather than soap scum |
Many panels have both. Clean the deposits off first, then judge what's left. If the glass still looks hazy after a thorough acid clean and the wet test, the remainder is etching.
Removing mineral deposits
For deposits, the cleaning trade's approach is acidic detergents or fine abrasives such as pumice or cerium oxide. A practical routine:
- Start mild. Spray white vinegar or a store-bought limescale remover, let it sit on the film for several minutes, then wipe with a non-scratch sponge.
- Test in a corner first, especially with stronger acids, and rinse thoroughly.
- Never mix an acidic cleaner with bleach. The combination releases chlorine gas. Ventilate the bathroom while you work.
- Keep abrasives off coated glass. If your glass has a factory protective coating, abrasives strip those coatings permanently.
- Don't forget the hardware and sweep. Minerals build up on the vinyl sweep too, and that's one reason sweeps typically last only 3–5 years. Avoid harsh acids on plated hinges, since corroded hardware is one of the signs a hinge is failing.
Never use a razor blade, steel wool or scouring powder on shower glass. Scratches catch minerals and make the next clean harder.
When it's etching
Etching is the glass itself dissolving, and vinegar does nothing for it. Restoring severely corroded glass is, at best, a formidable task. Light etching may be tolerable. It usually shows most in low, raking light and least when the glass is wet.
Your options:
| Option | When it makes sense | What to know |
|---|---|---|
| Live with it | Etching is light, the glass is otherwise sound | Keep up the daily squeegee so it doesn't get worse, and clean deposits so they don't hide it |
| Replace the etched panel (the usual fix) | Etching covers much of the panel, or you're selling or renovating | New safety glass made to your existing hole pattern, so the hinges and layout stay; worn hinges or sweeps can be replaced at the same visit |
| New enclosure (the exception) | Only if you want a different layout or glass thickness | That's a redesign rather than a glass repair; it's a chance to add a factory coating |
What a replacement panel involves
Ontario's Building Code allows only safety glass in shower and bathtub enclosures. Your new panel will be tempered (or laminated), so it can't be cut or drilled after it's made. It's fabricated to your measurements with holes placed for your existing hinges, which typically takes 7–14 business days. Our shower door repair guide explains how hinges and glass are matched.
What it costs
In Toronto, frameless glass runs about $40/ft² for 10 mm and $50/ft² for 12 mm, with minimum jobs around $850. A frameless 10 mm door is commonly quoted at $900–$1,600 installed, and protective coatings at $50–$300. Prices depend on size, thickness and hardware.
Preventing it from coming back
The single habit that matters most is to squeegee the glass after every shower, top to bottom, and run the bathroom fan for 20 minutes or more. Water that's removed can't leave minerals behind.
A few more habits help:
- Clean weekly with a mild acidic or pH-neutral glass cleaner so film never gets a chance to build up.
- Keep the door open after showering so the enclosure dries.
- Manage bathroom humidity. Health Canada recommends keeping indoor humidity between 30% and 50%. A fan that actually clears the room helps the glass, the grout and the mirror too.
- Ask for a factory coating on new glass. It makes the squeegee job faster, but it won't survive abrasive cleaners.
The rest of your bathroom glass
The same moisture that clouds a shower door works on the mirror. Modern mirrors are float glass with a thin layer of aluminum or silver over a primer, sealed with paint on the back. When moisture gets behind that paint, usually at the edges, the silvering breaks down and turns black. Moisture is usually the primary culprit.
A few habits protect it:
- Spray cleaner onto the cloth, not the mirror, so liquid doesn't run down and sit at the bottom edge.
- Skip ammonia-based cleaners on mirrors.
- Let it breathe. A mirror glued to the wall should never be sealed around its full perimeter, because air gaps let trapped moisture escape.
Black edges can't be cleaned off. Resilvering exists but is expensive and rarely offered, so a damaged bathroom mirror is normally replaced. Our custom mirror guide covers moisture-resistant backing and mounting.
When to call a pro
Call us if the glass is still cloudy after a proper clean and passes the wet test for etching, or if you've found chips or corrosion on the hardware while cleaning. A chipped edge is a safety issue as well as a cosmetic one. See why shower glass shatters. We'll tell you whether the panel is worth keeping, and if it isn't, measure for a replacement that fits your existing hinges.
Next step
If your shower glass has gone permanently cloudy, our shower glass repair service covers new panels and hardware. Send a photo of the glass wet and dry through our contact page for a free quote.