How to descale a shower enclosure

A glass shower enclosure looks beautiful, as long as the glass is clear. In large parts of the Netherlands the tap water is fairly hard. After every shower the water evaporates on the glass and leaves limescale and soap residue behind. First you see loose drip marks, then a grey haze and finally a hard white layer that normal cleaning no longer removes. In this blog you will read how to descale a shower enclosure step by step, what you need, how to work safely with descaler and which simple habits stop the limescale from coming back quickly.

👷 Calling in a professional is never superfluous. Is the enclosure loose, is water leaking along the profiles or the tray, or does the water drain away poorly? Then cleaning is not enough. An installer or bathroom specialist can find the cause and repair the enclosure or the drain properly.

Why does limescale form on the shower screen?

Hard water contains a lot of dissolved minerals, mainly calcium and magnesium. When the water dries on the glass, those minerals stay behind. Soap residue, shampoo and body oils stick to that limescale, creating a sticky layer in which dirt easily clings again. The longer you wait, the harder the layer becomes. Regular light maintenance is therefore much easier than one big clean once a year.

What do you need?

• A descaler for sanitary ware, such as Fila Deepclean descaler. Always read the label and test on an inconspicuous spot first.
• A mirror and glass cleaner for finishing the glass.
• A mild all-purpose cleaner such as Fila Brio universal cleaner or Fila Cleaner Pro cleaner for the tray, tiles and profiles.
• A soft sponge and a microfibre cloth; never use a scouring pad or steel wool on glass or chrome.
• A microfibre drying towel to rub everything dry.
• A 12-litre bucket of lukewarm water for rinsing.
• An old toothbrush for the corners and the seals.
• PPE: see below.

Working safely with descaler

Descalers are usually acidic. That is exactly why they dissolve limescale, but it also means you have to handle them with care.

• Gloves: wear latex-coated gloves so your skin does not come into contact with the product. You can read more about choosing gloves in our buying guide for work gloves.
• Eyes: safety goggles protect against splashes, especially when you work overhead at the shower head or the top of the screen.
• Ventilation: open a window or keep the extractor fan running. Do not work for hours in a small, closed bathroom.
• Never mix: never use descaler together with chlorine bleach or other cleaners. Rinse thoroughly before using another product.

⚠️ Acidic products can attack natural stone such as marble, travertine and limestone, as well as some coatings on glass or taps. If you are unsure which material you have, read the cleaner's label and test on a small spot first, or ask a professional for advice.

Step by step: descaling the shower enclosure

1. Empty the enclosure. Remove bottles, racks and the bath mat. That way you can reach everything and avoid stains on your things.
2. Wet the glass. Rinse the screens with lukewarm water. Loose dirt and soap residue already come off, and the product spreads more evenly.
3. Apply the descaler. Spray or wipe the descaler onto the glass, the bottom profiles and other spots with limescale. Start at the bottom and work upwards, so that drips running over dry glass do not leave streaks.
4. Let the product work briefly. Stick to the contact time on the label. Do not let the product dry on the glass.
5. Scrub lightly. Work in small circles with a soft sponge. Use the old toothbrush for the edges, the seals and the corners near the hinges.

1. Rinse thoroughly. Rinse away all descaler residue with clean water from the 12-litre bucket or with the shower head. Do not forget the bottom of the tray and the drain.
2. Polish the glass. Spray the mirror and glass cleaner onto the glass and wipe it streak-free with the microfibre cloth.
3. Dry everything. Squeegee the glass dry and wipe the profiles and the tap with the microfibre drying towel. A dry enclosure stays clear the longest.

Stubborn limescale

Is the layer not gone after one treatment? Repeat it; two short treatments are better than one that is far too long. Never use a knife or scraper on the glass, because scratches cannot be repaired. On the profiles and the bottom edge you can leave a piece of kitchen paper soaked in descaler for a few minutes, as long as the label allows it. Always rinse thoroughly afterwards.

Descaling the shower head and hose

The Luvio shower head also gets furred up. You notice it by thin, crooked jets. Unscrew the shower head from the hose, put it in a container with diluted descaler according to the label and rinse it through well afterwards. Many shower heads have rubber nozzles that you can rub clean between your fingers after soaking. If the head or the metal shower hose is worn or the connection leaks, replace the part. You can read more about a great shower in our blog about the rain shower.

⚠️ Is water leaking from the tap or the wall connection, or is there a built-in thermostatic mixer that no longer works properly? Then have it checked by a certified installer. Do not work on the water supply yourself.

Checking the sealant joints

While cleaning you can clearly see the condition of the sealant joints. Black spots that no longer come off, loose edges or cracks mean that water can get behind the sealant. Then it is time to replace it. Remove the old sealant with a knife and Fila Zero Sil silicone remover, let everything dry well and apply new sanitary silicone sealant with a sealant gun. You can read how to do that step by step in our blog on resealing a bathroom with new silicone.

Preventing limescale: keeping the glass clear for longer

• Squeegee the glass dry after every shower. It takes half a minute and prevents most limescale.
• Open the door or window after showering so the bathroom dries quickly.
• Clean the enclosure lightly once a week with a mild cleaner, instead of intensively once a month.
• Do not put bottles on the bottom edge of the enclosure; water stays there.

When do you call in a professional?

• When water leaks along the bottom of the enclosure or through the profiles.
• When the door no longer closes properly or the hinges are loose.
• When the drain stays slow, even after cleaning the drain cover.
• When you want a new enclosure installed. Also read our blog on installing a shower enclosure and our guide to planning a bathroom renovation.

In those cases a bathroom specialist or installer is never superfluous: leaks behind tiles or under the tray quickly lead to damp and mould problems.

Frequently asked questions

How often should I descale my shower enclosure?

That depends on how hard the water is and how often the shower is used. With light weekly maintenance and daily drying, a thorough descale a few times a year is usually enough.

May I use vinegar?

Vinegar also dissolves limescale, but like other acidic products it can attack natural stone, seals and some coatings. A sanitary descaler with a clear label gives more certainty about how to use the product.

My glass stays dull, even after descaling. What now?

Sometimes the glass itself has been etched by years of limescale or by abrasive cleaners. Cleaning no longer helps then. A professional can assess whether the glass or the door needs replacing.

Can I descale the enclosure with a steam cleaner?

Steam loosens dirt well, but hard limescale usually does not disappear with it. Do not use steam on sealant joints and seals if the manufacturer of the enclosure advises against it.

Where can you find everything for this job?

At Saniso, the online store for DIYers and professionals, you will find tools, materials and personal protective equipment for your job.

• Browse our construction tools and our workwear and safety.
• Create a customer account and order easily.
• Working on a bigger project or want to hand over the job? Request a project quote.
• Book a showroom visit, at least 24 hours in advance.
• Not sure which material suits your job? Get in touch with us.

In doubt about the approach? Feel free to call in a professional.

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