













Bio Clean Hard Water Stain Remover 40 oz. (20.3 oz.)
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Nicole Capuli
> 3 dayI moved into a new place and the hardware was grimy that even bleach and peroxide and dawn dish soap wasn’t working to remove the grime on my shower head and faucet and the stains in the tub. This, however, actually worked! Highly recommend this. Also it smells minty, which is a nice touch. I would buy this again in a big bottle.
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Dr. Gwendolyn Gleichner
> 3 dayIncredible. Removed hard water stains from windows without even rinsing in minutes. Vinegar wouldn’t touch these stains either.
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Traci Glaser
08-06-2025If youre questioning if you should try this or not... just add it to your cart now! We have hard water-we remodeled our bathroom Im 2016 and now only 6.5 years later our sink was looking so grungy because of it. Ive tried product after product with no results. I saw the reviews for this and it was on sale so I thought what the heck Ill try one more thing and Im glad I did. I posted pictures of the difference in our sink after using this product and 20 minutes of minor elbow grease. Amazing! Im so pleased!
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Lou Ann Brothman
> 3 dayI don’t often write reviews. Great Product
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Yana
> 3 dayI don’t do reviews much, but I had to for this product! Best thing ever for hard water stains. We have a big window in our master shower at the property we just bought and we thought it will need replacing because looked like previous owners never cleaned it. 2 window companies came out and said it will cost us about $700, well before doing the order I decided to try this and OMG!! With a little elbow grease it worked like a charm ! On the picture on the left you see before and on the right after.
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Shane Mirkovich
Greater than one weekIve tried dozens of different name brand products to clean mineral hard water deposits and soap scum, and its very very difficult. This product still requires elbo grease, but only a fraction of the effort required by most other products, including vinegar and/or baking soda. I think with regular use, this can become a very easy way of cleaning hard water deposits.
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ROBYN
> 3 dayI live full time in a luxury RV. After about 2 or 3 years, the toilet was not staying clean. Although I didnt have other signs of it, I figured it had to be due to hard water scaling. The porcelain bowl seemed like the finish had been ruined on it. Anyone thats used an RV toilet knows that they use very little water. They flush more on gravity than on the principal of water. So if the sides get chalky stuff sticks and even stains. Its beyond gross. But you also have to take the seals into account. So harsh chemicals are out. Tearing down a toilet to replace the seals ranks up there with bikini shopping in February... It may be necessary at some point, but its not going to be fun! Since I refused to use harsh chemicals, I knew the finish hadnt been ruined by anything. I had tried leaving it full of vinegar overnight, but it didnt resolve the issue. It didnt even remove all the staining. Neither did my usual mixture of laundry powder, borax, powdered water softener, and laundry soda. So... I decided to give this a go! I drained all the water out and slathered this on. I let it sit about 20 minutes. Then I added a cup or so of water, and used my chosen implement of destruction... A drinking glass scrub brush. No buffing with a cloth or anything. It was much improved! So much so that when I decided to repeat this tactic, the product, which is quite thick, wouldnt cling to the sides... It just slid down to the bottom seal. But I used a piece of paper towel and reslathered it all over. Let sit. Did the water and brush thing again. It has a faint mint smell, so it doesnt require having to open all your windows and turn on the roof vent fan. A deodorizer it isnt... But thats not what I bought it for and really appreciated its mild scent when my head was 8 inches away from a toilet full of it! Omg. Its like my toilet is brand new. Both the porcelain bowl, as well as the vinyl seal flap! Its so slick, you cant even get toilet paper to stick on it if you wanted to. Im definitely impressed! And it doesnt seem to have caused any harm to the rubber seals or vinyl flap. Now, I admit that it was only $12.99 when I bought it. I do think that price was more than fair. Im not sure Id pay $20+ for it. But then, Im on a fixed income and watch every dollar. But compared to the outrageous price a new porcelain RV toilet would be... Its definitely a bargain at almost any price. Id definitely recommend trying it on hard to remove scaling and the stains that come with it from rust or such. From what Ive read, the problems folks have had seem to come from being too aggressive with it. So being lazy with this stuff is the way to go... Which works perfectly for me!
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Janipurr
Greater than one weekWe have very hard water where we live, and I had tried several things to remove the hard water spots from my glass shower door and side wall. The house is about 20 years old, though we have only been here 6 years, the previous tenants werent exactly meticulous about cleaning. Tilex, vinegar, etc., nothing worked. The vinegar works fine if you can soak an item, but spraying it on a vertical surface was just not effective. Finally tried this stuff, and my shower looks about 95% clear, with a bonus that the water sheets off of it nicely now. It does take some elbow grease, but I did it in stages over a couple days and it really wasnt that bad. I took off a star because it really didnt touch the gross yellow crusty build up at the base of the door that no amount of scrubbing or product of any kind seems to touch. I may try a scrub brush drill attachment if I can find one, and see if that works.
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insindiary1
> 3 dayThis product is great for cleaning homes who want a biodegradable product that is not harmful to pets and children , gets hard water stains and rust out of just about any thing . Spendy but lasts a long time .
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LP
> 3 dayIm not sure what kind of dark magic this is, but some one should call the church. This stuff is amazingly easy to use with immediate results. On my all-glass shower surround, I have used magic eraser, Windex, CLR, Scrubbing bubbles, and there was always a residue, bulging muscles and a need for Ibuprofen by the time I was done. I was almost nonchalantly applying this stuff on (with only 1 paper towel for the whole massive shower) and then just rinsed it off with water from the shower head and it looks like new...for those in the back, IT LOOKS LIKE NEW!!! And now the water is beading up and running down like a thing of beauty. I may have whispered I love you to the bottle. This stuff is amazing.