What to Put in a Soap-Dispensing Toilet Brush and What to Avoid

Summary

Your Moostar Push Brush holds 40ml of cleaning solution and works best with liquid toilet cleaners like Duck Toilet Cleaner. Bleach, thick pastes, and foaming products should never go in the reservoir. The non-porous silicone head does the heavy lifting, and Good Housekeeping agrees it is genuinely worth the switch.

We all will agree that most of us have stood in the cleaning aisle, toilet cleaner in one hand and a brand-new soap-dispensing brush in the other, thinking: Does it actually matter what I put in here? It does. Quite a lot, actually.

Your Moostar Push Brush has a built-in 40ml soap reservoir that dispenses cleaning solution directly onto the silicone bristles with a single push. That is the bit that makes cleaning so satisfying. But because the reservoir is part of the brush itself, what you fill it with matters for how well it performs and how long it lasts. Here is exactly what works, what does not, and why.

But before anything, we would love to share something that truly matters to us. Let’s have a look here and see why Moostar is so popular in UK homes. 

Tried, Tested, and Approved by Good Housekeeping

We might be a little biased about our own brush, so we will let someone else do the talking. Good Housekeeping tested the Moostar Push Brush and came back with this: 

"Throw out your grotty toilet brush! This £20 silicone brush is more hygienic and dispenses its own toilet cleaner." Their reviewer, Jasmine Vorley, also called it "the best-looking toilet brush I've ever seen." And given that they test just about every cleaning product on the market, that means something.

What stood out in the review was exactly what we have been talking about here — the combination of the antibacterial silicone head and the soap-dispensing mechanism. Not just a brush that looks good, but one that actually cleans better. The non-porous silicone does not hold onto bacteria between uses, and the built-in reservoir means the right amount of cleaner reaches the bowl every single time.

That kind of endorsement from Good Housekeeping carries real weight because they test things the way real households use them. If you are still choosing your finish, the Push Brush comes in black stainless steel, grey stainless steel, and the premium Luxe range for something a little more elevated. Every single one uses the same patented soap-dispensing silicone head.

What to Fill Your Soap-Dispensing Toilet Brush With?

Duck Toilet Cleaner- Our Top Pick

The one product we actively recommend is Duck Toilet Cleaner. It is the cleaner Moostar suggests by name. It flows cleanly through the dispenser port, coats the silicone bristles properly when released, and gets the job done without leaving any residue inside the tank. Fill up to 40ml, and you will get roughly ten cleaning sessions from a single fill, which makes it very economical day to day.

Any Liquid Toilet Cleaner That Pours Freely

Beyond Duck, any liquid toilet bowl cleaner with a smooth, pourable consistency will work well in the reservoir. The mechanism is built for liquids, something that flows freely through the small dispenser port without any force. As long as it pours easily from the bottle, it will dispense just as easily onto the brush.

One thing worth remembering: the silicone brush head on your Moostar is made from non-porous antibacterial silicone, which means it does not trap bacteria in the way traditional bristle brushes do. You do not need an aggressive cleaner to get a hygienic result. The material does a lot of the work on its own. A good liquid toilet cleaner, released in the right amount, is genuinely all you need.

What to Keep Out of Your Soap-Dispensing Toilet Brush?

Bleach- A Big NO!

This is the one that catches most people out, so it is worth being clear: do not put bleach in the reservoir. We are explicit about this. Bleach does not perform well inside the solution tank. It can degrade the silicone over time, it tends to thicken rather than flow through the dispenser port cleanly, and it can cause problems inside the sealed tank that you really do not want.

If you want to use bleach, a weekly bleach clean is absolutely fine. Pour it directly into the toilet bowl as normal, let it sit for a few minutes, then use your Push Brush to scrub. That way, you get the full disinfecting benefit without it ever touching the reservoir. Best of both worlds.

Thick Paste-Style Cleaners

Anything that comes out of the bottle in a thick gel cylinder rather than flowing freely is going to block the dispenser port. The mechanism is for liquids, not pastes. If you press the button and nothing comes out, a thick cleaner is almost certainly why. Stick to products with a genuinely pourable consistency, and you will never have that problem.

Anything That Produces Excessive Foam

The reservoir is a small, enclosed 40ml space. Cleaners that create a lot of foam, like fabric softener, shower gel, anything with a high lather, will bubble up inside the tank and make a mess when you press the button. It sounds obvious in hindsight, but it is worth mentioning because people do try it.

If you ever notice the dispenser feeling sluggish or blocked, rinse the tank through with warm water a few times and let it dry before refilling. And if the brush head itself needs freshening up, the Moostar replacement silicone head simply unscrews and screws straight back on. Quick, simple, no tools needed.

Final Words!

Got a question about your Push Brush that we have not covered here? Maybe you are unsure which cleaner works best for your water type, or you just want to know more about looking after your brush long term. Whatever it is, we are always happy to hear from you. Head over to our contact page and drop us a message. There is a real team behind Moostar, and we will get back to you properly.

And if you found this helpful, we think you will enjoy what else is waiting for you on our blog. We write about everything from bathroom styling ideas to practical cleaning guides for honest, straightforward advice that actually makes a difference at home. Pop over and have a browse whenever you need it.

FAQs:

What cleaning product do you recommend for the soap reservoir?

We recommend Duck Toilet Cleaner. It is our top pick and the one we mention by name. It flows cleanly through the dispenser, coats the silicone bristles properly, and gives you around ten cleaning sessions from a single 40ml fill.

Can I use bleach in my Moostar Push Brush?

No — and this is important. Bleach does not perform well inside the solution tank. It can degrade the silicone over time and tends to clog the dispenser port rather than flow through it cleanly. If you want to use bleach, pour it directly into the bowl, let it sit, then scrub with your Push Brush. 

How much cleaner does the reservoir hold, and how long does it last?

The built-in tank holds 40ml of cleaning solution, which gives you roughly ten full cleaning sessions. Each press dispenses onto both sides of the silicone head simultaneously, so you are getting good coverage with every use.

What happens if I accidentally use the wrong cleaner?

If the dispenser feels sluggish or blocked, rinse the tank through with warm water a few times and let it fully dry before refilling with the right product. If the brush head itself needs replacing after wear, our replacement silicone head simply unscrews and screws straight back on.

Does it matter what cleaner I use if the silicone head is already antibacterial?

The silicone head is non-porous and naturally resistant to bacteria, which means it does not harbour germs the way traditional bristle brushes do. That said, using the right liquid cleaner still makes a real difference to how effectively you clean the bowl itself.