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How to Deep Clean a Bathroom: Grout, Glass and Limescale

The order, products and techniques for a proper bathroom deep clean, from limescale on shower glass to grey grout and mould in the sealant.

To deep clean a bathroom, work from the top down: ventilate the room, clear every surface, descale the glass, taps and shower head, scrub the grout, then finish with the toilet and the floor. Done properly, a bathroom deep clean takes a few hours rather than the usual quick wipe-round, mostly because the products need time to work.

Across Hull and East Yorkshire the biggest challenge is usually hard water. Limescale builds up fast on shower screens and taps, and older terraced houses with small, poorly ventilated bathrooms also battle condensation and black mould. This guide covers both.

Below is the order our cleaners follow and what to use on each surface.

Key takeaways

  • Work from top to bottom and give products time to sit: dwell time does more than scrubbing harder.
  • Use an acid-based descaler for limescale and a separate mould treatment for grout, and never mix the two.
  • A squeegee after every shower is the easiest way to keep glass clear in a hard water area.
  • Black mould under silicone sealant usually can’t be cleaned out; the sealant needs cutting out and replacing.

What does a bathroom deep clean include?

A weekly clean keeps the bathroom presentable. A deep clean goes after the build-up that a weekly clean skips. Our guide to the difference between a deep clean and a regular clean explains it in more detail.

A thorough bathroom deep clean covers:

  • Extractor fan cover, light fittings and the ceiling, especially corners where mould starts
  • Every tile from ceiling to floor, plus the grout lines between them
  • Shower screen, door tracks, seals and the shower tray or bath
  • Shower head, hose and riser rail
  • Taps, overflows and plugholes
  • The whole toilet, including the hinges, the base and the pipework behind it
  • Bath panel, skirting boards, pipes and the towel rail or radiator
  • Mirrors, the inside of the bathroom cabinet, door, handles and light pull or switch
  • The floor, right into the edges and behind the toilet

This is the same list our team works through on a professional deep clean, so you can use it as a checklist whether you do it yourself or book help.

What you need to deep clean a bathroom

A short, well-chosen kit does the job:

  • Microfibre cloths, with a separate colour kept just for the toilet
  • A stiff grout brush or an old toothbrush
  • A non-scratch scourer for baths, trays and glass
  • A squeegee
  • A limescale remover, or citric acid crystals mixed with warm water
  • A mould and mildew spray, or an oxygen-based bleach for grout
  • Bicarbonate of soda for making a gentle scrubbing paste
  • Rubber gloves, a bucket and a sturdy step stool

Tip: Never mix bleach-based products with limescale removers, vinegar or other acids. The combination releases chlorine gas. Use one, rinse thoroughly, then use the other, and keep the window open throughout.

How to deep clean a bathroom step by step

  1. Ventilate and clear. Open the window, run the extractor fan and take out bottles, mats, towels and the bin.
  2. Dust the high areas. Wipe the light fittings, cabinet top and ceiling corners. Switch off the extractor and wash the cover if it unclips.
  3. Apply descaler. Spray the shower screen, taps and tiles with limescale remover and leave it for the time on the label.
  4. Treat the toilet. Squirt limescale remover under the rim and around the waterline, then leave it to work while you clean elsewhere.
  5. Scrub tiles and grout. Work in sections from the top down, rinsing as you go so loosened dirt doesn’t dry back onto clean areas.
  6. Clean the shower. Scrub the screen, tracks, seals and tray, then descale the shower head (more on that below).
  7. Bath, sink and taps. Clean the bath, the bath panel and the sink, including plugholes, overflows and the base of each tap.
  8. Finish the toilet. Brush under the rim, then wipe the cistern, handle, seat, hinges, outside of the bowl, base and pipes, in that order.
  9. Mirrors and fittings. Polish the mirror and cabinet, wipe the towel rail, door, handles and light switch.
  10. Floor last. Vacuum or sweep, wipe the skirting boards, then mop from the far corner back towards the door.

How to clean grout and get rid of mould in sealant

Grey or grubby grout

Work a paste of bicarbonate of soda and water into the grout lines with a stiff brush and rinse. For grout that stays grey, oxygen-based bleach (sodium percarbonate) dissolved in warm water usually lifts the staining without chlorine fumes. Avoid wire brushes, which scratch tiles and wear grout away. Once clean and dry, a grout sealer helps it resist staining.

Black mould in grout and silicone

Spray a mould remover onto the affected area, leave it for the recommended time and rinse well. If black spots remain in the silicone sealant, the mould has grown into it, and the sealant needs cutting out and replacing once the joint is completely dry.

Mould that keeps returning points to a ventilation problem rather than a cleaning one. Our guide to condensation and black mould in older Hull homes explains the causes, which are common in the compact bathrooms of terraces around the Avenues and off Hessle Road.

How to remove limescale from shower glass, taps and shower heads

Much of the area is supplied with hard water by Yorkshire Water, and you can check your own postcode on their website. Our hard water and limescale guide for Hull and East Yorkshire goes deeper, but these are the bathroom essentials:

  • Shower glass: apply descaler or a citric acid solution, leave it to soften the scale, work over it with a non-scratch pad, rinse and squeegee dry. If your glass has a protective coating, check the manufacturer’s advice first.
  • Taps: wrap kitchen roll soaked in descaler around the base of each tap and leave it. Unscrew the aerator on the spout and soak it separately, then scrub with a toothbrush.
  • Shower heads: unscrew the head and soak it in citric acid solution or white vinegar, then rub the nozzles clear. For a fixed head, tie a bag of solution around it.
  • Toilet: limescale gel under the rim and on the waterline ring, left as long as the label allows. A toilet pumice stone kept wet can shift stubborn rings on vitreous china, but test a hidden area first.

Acid-based products etch natural stone such as marble and travertine, and can damage some brushed or coloured tap finishes. Use a pH-neutral cleaner on those surfaces.

How often should you deep clean a bathroom?

For most homes, a full bathroom deep clean every few months is enough, with a regular clean in between. Busy family bathrooms and homes with very hard water benefit from more frequent descaling. For the whole house, our guide to deep cleans and regular cleans includes a task-by-task schedule.

Task How often
Squeegee shower glass and tiles After every shower
Wipe sink, taps and toilet seat Every day or two
Clean toilet, sink, bath, shower and floor Weekly
Wash bath mats and shower curtain Every couple of weeks
Descale shower head and clean extractor fan cover Every few months
Full deep clean, including grout and sealant Every three to six months

The most common mistakes are wiping products off before they’ve had time to work, using abrasive pads on acrylic baths and trays, and leaving glass and taps to drip-dry, which is exactly what creates new limescale.

When a professional bathroom deep clean makes sense

If the limescale has been building for years, the grout has gone dark or you simply don’t have a free afternoon, our team can take it on. A bathroom and whole-home deep clean is carried out by DBS-checked cleaners who bring their own equipment and products, at a fixed price agreed before we start. We cover homes across the city through our deep cleaning service in Hull, as well as in Beverley and the surrounding villages.

Once it’s back to its best, regular house cleaning keeps it that way, and if you’re moving out, bathrooms are one of the first rooms checked on an end of tenancy clean. Get in touch for a fixed quote.

FAQs

Frequently asked questions

What is the best thing to deep clean a bathroom with?

A limescale remover or citric acid solution for glass, taps and the toilet, a mould spray or oxygen bleach for grout, and microfibre cloths for everything else. Keep acid and bleach products separate and rinse between them.

How long does it take to deep clean a bathroom?

Usually a few hours for an average bathroom, depending on how much limescale and mould has built up. Much of that time is products being left to work before scrubbing.

How do I get my grout white again?

Scrub with a paste of bicarbonate of soda and water, then use oxygen-based bleach for stubborn grey staining. If the grout is crumbling or the stains won’t shift, regrouting may be the better option.

Why does black mould keep coming back on my bathroom sealant?

Usually because the mould has grown into or behind the silicone, and because the room isn’t ventilated enough to dry out after showers. Replace the sealant and improve ventilation to stop it returning.

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