You cleaned the shower on Sunday. By Wednesday the glass has gone cloudy again — that chalky white film that no amount of wiping seems to shift, and that makes an otherwise tidy bathroom look neglected.
Shower glass is the surface that shows every mistake. It is flat, it is lit, and it is the first thing you look at. It is also the surface most people clean the wrong way, because the film on it is not dirt. It is a chemical deposit, and it needs chemistry — not effort — to remove.
Quick Answer: Spray the glass with equal parts white vinegar and warm water plus a squirt of dishwashing liquid. Leave it for 10–15 minutes — that dwell time is the whole trick — then wipe with a non-scratch pad and squeegee dry. For years of build-up, use undiluted vinegar and give it 15 minutes. Then squeegee after every shower and it will not come back.
Why Shower Glass Goes Cloudy
Two different deposits build up on shower glass, usually together.
Soap scum forms when the fatty acids in bar soap react with the calcium and magnesium in your water. The result is calcium stearate — an insoluble, chalky film that bonds to wet glass and hardens as it dries. It feels slightly greasy, and it is grey-white rather than pure white.
Limescale is the mineral itself, left behind when hard water evaporates off the glass. It is harder, whiter and feels crusty rather than slippery.
Both dissolve in a mild acid, which is why vinegar is the answer to both. Neither responds to scrubbing alone, which is why the Sunday scrub keeps failing.
It is worth staying on top of, too. Research by microbiologist Dr Charles Gerba at the University of Arizona found that soap scum on shower surfaces forms a biofilm that can harbour over 60 million bacteria per cubic centimetre. A clear screen is a more hygienic one.
How to Clean Shower Glass
For everyday build-up
Mix the spray. Equal parts white vinegar and warm water in a spray bottle, plus a squirt of dishwashing liquid. The detergent cuts the greasy soap component; the vinegar dissolves the mineral one.
Spray the whole panel — top to bottom, both sides if the outside is filmy too.
Wait 10–15 minutes. This is the step almost everyone skips, and it is the step that does the work. Spraying and wiping straight away removes nothing but the water you just added.
Wipe with a non-scratch pad — the soft side of a kitchen sponge, or a microfibre cloth for light film. Work in overlapping horizontal passes.
Rinse with warm water, then squeegee dry. Drying is not optional: water left on the glass deposits the next layer of minerals as it evaporates.
For years of build-up
Use undiluted white vinegar, warm it slightly (a hot tap is enough), and apply it with a cloth so it clings rather than runs. Leave it 15 minutes, re-wet any patches that dry out, then work the panel over with a non-scratch pad.
Heavy deposits usually need two passes rather than more force. If a second full treatment leaves the glass noticeably clearer but not clear, do a third — you are removing layers, and each one comes off the same way.
When the glass will not come clear
There is a point past which no cleaner helps. If minerals sit on glass for years, they physically pit the surface, and the cloudiness is now etching rather than deposit.
The test: wet the dry, cloudy area. If it turns clear while wet and goes cloudy again as it dries, the deposit is still on the surface and more vinegar will get it. If it stays cloudy when wet, the glass itself is etched — no product will fix it. The options at that point are a professional glass restoration polish or replacing the panel.
Etched glass is also the reason to treat a new screen properly from day one. Prevention here is not a nice-to-have; it is the difference between a screen that lasts and one that never looks clean again.
Hard Water Makes All of This Worse
If your glass films over within days rather than weeks, your water is likely the reason.
Under the Australian Drinking Water Guidelines, water above 200 mg/L calcium carbonate is classified as hard. Perth, Adelaide and much of regional Queensland consistently test at hard to very hard levels. Melbourne and Hobart have some of the softest water in the country — which is why the same shower routine produces very different glass in different cities.
The quick test: if your soap barely lathers and you use more shampoo than you expect to, you are in a hard-water area. Three things help:
Switch from bar soap to liquid body wash. Synthetic detergents do not react with hard-water minerals the way bar soap does, so the scum component largely stops forming.
Dry the glass. Minerals only deposit when water evaporates on the surface. Remove the water and you remove the deposit.
Consider a shower filter if you are in Perth or Adelaide. It reduces mineral content at the source and extends the life of tapware as well as glass.
For the full picture on water hardness — including what it does to kettles, taps and laundry — see our guide to hard water in Australian homes.
The 30-Second Habit That Keeps It Clear
Everything above is remedial. This is the part that means you rarely have to do it again.
Squeegee the glass after every shower. It takes about 30 seconds, it happens while you are still in the bathroom, and it removes the water before the minerals in it can dry onto the surface. One habit prevents both deposits at once.
To make it stick:
Keep the squeegee in the shower, on a suction hook at eye height. A squeegee in the cupboard is a squeegee nobody uses.
Work top to bottom in overlapping vertical passes, finishing at the door seal where water pools.
Leave the screen or door open afterwards so the frame, seal and tracks dry too — those hold water long after the glass looks dry.
Wipe the seal weekly. The rubber strip along the bottom traps water and is where shower mould starts. If it is already black, see how to remove mould.
Do a vinegar treatment monthly, not weekly. With a daily squeegee, a monthly spray-and-dwell is enough to keep glass genuinely clear.
A commercial water-repellent glass treatment (Enduroshield and similar, sold through bathroom retailers and Bunnings) makes the squeegee step more effective by stopping droplets clinging in the first place. It is not a substitute for drying the glass — it just means less is left behind when you do.
What Not to Use on Shower Glass
Abrasive powders, steel wool or magic-eraser pads. They scratch the glass permanently, and scratched glass films over faster because the deposit has more to grip.
Bleach. It does nothing to mineral deposits, and it must never meet vinegar — the combination produces toxic chlorine gas. If you switch products, rinse the surface thoroughly first. — NSW Health
A vinegar-and-bicarb paste. As Dr Nathan Kilah, Senior Lecturer in Chemistry at the University of Tasmania, explains, "The fizzy action is essentially a visual placebo" — the acid and base neutralise each other, leaving mostly water and sodium acetate. Use them separately, never mixed.
Vinegar on the frame, if the frame is matte black. The glass tolerates it; the finish beside it may not. See the tapware note below.
The Rest of the Shower
The glass is the hard part. The surfaces around it each want a different approach — and using the wrong one causes damage that cleaning cannot undo.
Ceramic and porcelain tiles. Make a paste of bicarb soda and water (roughly 3 tablespoons to 1 tablespoon), apply, leave 15 minutes, scrub with a damp microfibre cloth and rinse. For stubborn build-up, spray undiluted vinegar first, wait 10 minutes, rinse, then use the bicarb paste as the abrasive — separately, never mixed into one paste.
Chrome and stainless steel fittings. Spray a 1:1 vinegar-water mix onto a cloth rather than the fitting, wipe, and rinse within 5 minutes. Prolonged vinegar contact can break down the protective chromium oxide layer. Dry immediately. Full guide: how to clean chrome taps and keep them rust-free.
Matte black tapware. The one finish where most methods cause damage. Con-Serv, an Australian bathroom fittings manufacturer, warns that matte black "can be damaged by abrasive, chemical cleaners like bleaches, waxes, polishes and anything acidic — including homemade vinegar cleaners." Use warm water and a soft microfibre cloth, or a pH-neutral cleaner labelled safe for matte finishes. Dry immediately.
Natural stone (marble, limestone, travertine). Never use vinegar, lemon juice or any acid. According to stone care specialists at Marblelife, acidic cleaners cause permanent etching on calcium-based stone. Use a pH-neutral stone cleaner or warm soapy water.
Brass and bronze. Warm water and a damp microfibre cloth first. For heavier build-up, a bicarb soda paste for 5 minutes, then rinse. Avoid vinegar on lacquered or coated brass — it strips the finish.
Plastic shower curtains. Machine wash with 2–3 bath towels (they act as scrubbers), half a cup of detergent, warm gentle cycle, hang to dry. Never tumble dry.
What Doesn't Work
Spraying a general bathroom cleaner and wiping straight away is the most common mistake, and it fails for a specific reason: most cleaners need 10–15 minutes of contact to break the bond between the deposit and the glass. Spray-and-wipe is a maintenance routine, not a removal method.
Scrubbing harder is the second. Without the chemistry loosening the deposit first, force just wears out your arm and risks scratching the surface — which makes the next film worse.
If you would rather use a commercial product, CHOICE Australia's lab testing of 44 bathroom cleaners rated Ecostore Antibacterial Bathroom & Shower Cleaner and Earth Choice Bathroom Cleaner among the top performers. Both are stocked at Coles and Woolworths, and both still need the dwell time.
Frequently Asked Questions
Q: What is the best thing to clean shower glass with?
Equal parts white vinegar and warm water with a squirt of dishwashing liquid, left on the glass for 10–15 minutes before wiping. The vinegar dissolves the mineral deposit, the detergent lifts the greasy soap component, and the dwell time does the work that scrubbing cannot.
Q: How do I get hard water stains off shower glass?
Use undiluted white vinegar rather than a diluted spray, apply it with a cloth so it clings to the glass, and leave it 15 minutes. Heavy limescale usually needs two or three treatments rather than more pressure. If a wet patch stays cloudy when wet, the glass is etched and no cleaner will restore it.
Q: Why does my shower glass go cloudy so quickly?
Because water is drying on it. Every drop left on the glass deposits its dissolved minerals as it evaporates, and bar soap adds a second, greasier layer on top. In hard-water areas like Perth and Adelaide this happens within days. Squeegeeing after each shower and switching to liquid body wash removes both causes.
Q: Can I use bicarb soda on shower glass?
Use it as a mild abrasive on tiles, not as a first choice on glass — and never mixed with vinegar into a paste, which simply neutralises both. On glass, a non-scratch pad and enough vinegar dwell time will do the job without any risk of scratching.
Q: Is the white film on my shower glass soap scum or limescale?
Soap scum is grey-white and slightly greasy to the touch. Limescale is whiter, harder and feels chalky or crusty. Vinegar dissolves both, so the distinction only matters if the deposit refuses to shift after 15 minutes — at which point a dedicated limescale remover such as CLR Bathroom & Kitchen Cleaner is the next step.
