Cloudy shower glass: why it happens, and how to fix it
If your shower screen has turned cloudy and no amount of scrubbing brings it back, the glass is not dirty — it is damaged. Here is what is actually happening, why a hydrophobic coating helps early, and when a new screen is the honest answer.
What the cloudiness really is
Perth’s hard water carries dissolved minerals. Every time the screen dries, those minerals are left behind, bonding with soap and body-wash residue. Over months they build into a film, and eventually they etch into the surface of the glass itself. Etching is microscopic pitting — mechanical damage — which is why, past a certain point, no spray-on cleaner will shift it.
Why cleaning stops working
Cleaning removes what sits on top of the glass. It cannot remove damage that has become part of the glass surface. That is the wall most people hit: the screen looks permanently frosted in patches, worst where the water runs down and dries.
Can it be fixed?
Yes — though there's a smarter order to it. Once glass is etched, it can be mechanically polished back with cerium-oxide compounds — the same way we bring back car and boat glass. Out in the open that's straightforward: the fine slurry the polisher throws off just washes away. A shower screen is different — boxed into a tiled recess with tapware and walls all around it, so that slurry goes everywhere, making it a slow, messy job whose labour usually costs more than a new screen. So the honest answer is to work earlier: while the glass is still sound, a good clean plus a hydrophobic coating stops the minerals bonding and keeps it clear, so it never reaches the etched stage. Whether a polish or a new screen is the better value once glass is etched is a call our team makes with you at assessment.
Keeping it clear
The key is a hydrophobic coating: water sheets off instead of drying in place, which means minerals have far less chance to bond. Day to day, a rinse and a wipe keeps it clear; the written care guide tells you what to use and, just as importantly, what to avoid — some abrasives and supermarket products do more harm than good.
Coat or replace?
Replacement makes sense when the framing or hardware has failed, the glass is cracked, or the glass is badly etched. If the glass is still sound and just starting to scale, cleaning and coating it is cheaper and keeps your existing screen. Etched shower glass can be polished back, but in an enclosed recess the mess and labour usually cost more than a new screen — so our team weighs that up with you rather than pushing one way or the other. (Outdoor pool fencing is easier: out in the open, salt-etched glass is more often worth polishing and restoring.)
Common questions
Not necessarily. Etched glass can be polished back with the same cerium-oxide method we use on car and boat glass — but a shower screen sits boxed into a tiled recess, where the polishing slurry sprays over everything, so it's messy and the labour usually costs more than a new screen. Caught earlier, before etching, a clean and a hydrophobic coating keeps it clear — and that's the real win. Our team advises which path fits at assessment.
It changes the game — water sheets off instead of drying on the glass, so minerals have far less chance to bond. Light, product-free cleaning keeps it that way.
Yes — outdoor pool fencing and balustrades cop even more salt, and out in the open we can polish salt-etched panels back with cerium oxide, then coat them. Indoor shower glass can be polished too, but boxed into a recess it's messier and usually dearer than a new screen, so our team advises case by case.
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Glass coating overview · Shower screen coating · Pool fencing · Get an estimate