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Best and cheapest industrial strength toilet cleaner?

24 replies

TalkToTheHand123 · 20/08/2026 22:54

I visit a client regularly and the bottom of the toilet is black. I've used lots of toilet cleaner but it doesn't clean. Anyone able to recommend a suitable product?

OP posts:
ALevelBNotLevel · 20/08/2026 22:56

Harpic, the black one, is very good but for heavy limescale you need to remove most of the water first and ideally leave it for several hours or overnight.

MiceSpiders · 20/08/2026 22:57

Diet coke

Penkie · 20/08/2026 22:57

Have you tried a scratchie? I find it's not the cleaning product that helps remove stains, but the hard abrasive rubbing with elbow grease.

Tortephant · 20/08/2026 23:02

Citric acid

ComtesseDeSpair · 21/08/2026 08:59

If there’s a lot of build-up at the bottom of the bowl then that needs to be broken down - Harpic Power Plus tablets are good for this though should ideally be left in for 12 hours so it’s something you’d have to ask client to do overnight before you arrive. You can then use an abrasive sponge to manually clean.

I use the Ecover Power toilet cleaner day to day and it works really well. Do you know what client does cleaning wise in between your visits? If they squirt some cleaner around the bowl and rim every other day or so it helps stop limescale and grot building up.

StrawberryPi · 21/08/2026 09:21

I had some stubborn stains that had built up in mine, and saw that if you use a toilet brush you can kind of pump most of the water out of the bowl. Then use lots of whatever cleaner (I used Harpic Black as reccomended above), leave it for a good few hours, then give it a really good flush. Worked like magic even when the same cleaner hadn't really done anything without taking the water out!

PamelaColmansMustard · 21/08/2026 11:09

I'm never one to advocate bleach down the toilet, but I bought some HG mould remover last week for the bathroom walls etc and was so impressed, I aimed a quick spray down the toilet and left it for half an hour or so. It gleamed.

I usually use washing up liquid or hand soap or whatever is to hand, and occasional steradent overnight, but I bought a bottle of Astonish toilet gel, good stuff but probably not for really bad stains.

Mudflaps · 21/08/2026 11:15

I don't use bleach etc because we have our own septic system and need to be careful of what goes into it, we need the bacteria (actually started adding a bacteria supplement when we had issues with it which worked wonders) and our water (own well) is very hard with a lot of lime so I use a pumice stone to remove any limescale build up, it works without scratching the toilet. Stick on a pair of rubber gloves and get scrubbing.

Aparecium · 21/08/2026 14:31

Because of my allergies I prefer to use unfragranced thin bleach, which I can no longer find in the shops.

So I buy this instead: https://www.amazon.co.uk/dp/B00COM84IM?ref=ppx_pop_mob_ap_share

It is unfragranced thin bleach at about 4x concentration of the stuff I used to buy in the supermarket. I dilute it for household use, except in the toilet. If the toilet starts looking manky I lob a bit in. About a cupful, but I don’t measure. The bleach is so strong that even an hour soak is usually enough. It won’t get rid of limescale (we have a water softener, so limescale is never a problem for us.)

TalkToTheHand123 · 21/08/2026 23:08

ComtesseDeSpair · 21/08/2026 08:59

If there’s a lot of build-up at the bottom of the bowl then that needs to be broken down - Harpic Power Plus tablets are good for this though should ideally be left in for 12 hours so it’s something you’d have to ask client to do overnight before you arrive. You can then use an abrasive sponge to manually clean.

I use the Ecover Power toilet cleaner day to day and it works really well. Do you know what client does cleaning wise in between your visits? If they squirt some cleaner around the bowl and rim every other day or so it helps stop limescale and grot building up.

He just uses standard toilet cleaner.

OP posts:
Summer27Worries · 22/08/2026 06:56

I would recommend Kilrock. It's brilliant!
Whilst they make a variety of products, I have always used the one in the bottle with the yellow lid.

Best and cheapest industrial strength toilet cleaner?
goingtotown · 22/08/2026 07:13

Spirits of Salts

Sunflower2222 · 22/08/2026 07:14

Spirits of salt - available on Amazon. It’s industrial strength and very effective.

JortsNTeeShirt · 22/08/2026 07:17

Black Harpic. A good soak and scrub. Might take a couple of goes, but it will work. Then use black Harpic regularly to keep it clean.

WarriorN · 22/08/2026 07:20

Big bottle of vinegar, leave for an hour. Pumice toilet scrubber or use a scourer with gloves on

WarriorN · 22/08/2026 07:22

These things:

I leave the vinegar on all night sometimes but that may not be possible

Best and cheapest industrial strength toilet cleaner?
BigMommasHouse · 22/08/2026 08:26

Brick acid left overnight. Gets rid of absolutely everything

StrugglingAlong75 · 23/08/2026 17:03

Citric acid overnight.

mumsberkshire54 · 27/08/2026 17:53

Spirit of Salts (hydrochloric acid) will break down that black calcified scale, but it takes a bit of work!
If she doesn't want to deal with harsh chemicals herself, My CleanerHub connects people with local cleaners who bring professional equipment to tackle stubborn drain and toilet scale so she doesn't have to!"

TalkToTheHand123 · 29/08/2026 12:03

A little update. I tried bicarbonate of soda and white vinegar. Seems to have helped a little. I was only there a few mins. I will check again next week. Thanks for all the tips.

OP posts:
Nat6999 · 20/09/2026 04:08

Use a toilet brush to push all the water round the U bend then use citric acid & boiling water, then after that has gone cold an old pan scrubber to get the last remnants off.

EmailsaysOOO · 20/09/2026 05:51

MiceSpiders · 20/08/2026 22:57

Diet coke

Hi, please can you give me a bit of explanation on how you use it? How much, and do you push all the water over the u-bend first?

TalkToTheHand123 · 20/09/2026 21:11

ComtesseDeSpair · 21/08/2026 08:59

If there’s a lot of build-up at the bottom of the bowl then that needs to be broken down - Harpic Power Plus tablets are good for this though should ideally be left in for 12 hours so it’s something you’d have to ask client to do overnight before you arrive. You can then use an abrasive sponge to manually clean.

I use the Ecover Power toilet cleaner day to day and it works really well. Do you know what client does cleaning wise in between your visits? If they squirt some cleaner around the bowl and rim every other day or so it helps stop limescale and grot building up.

He didn't use anything and don't think he does now. I had to bring toilet cleaner to leave there and use each time I visit. I used bicarbonate of soda or baking soda, forget which one and white vinegar. It's cleaned a little section of it but not much. I think I have seen the black harpic in a shop I often visit, so I may try this.

OP posts:
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