Hard Water Spot Calcium Stain Remover EXTRA LARGE 40oz

Great product for removing hard water stains from windows and showers

We use BIO-CLEAN Septic product and have been really impressed with what it does; so I bought this for the bathrooms. Works great on the tile and grout on a shower I installed 10 years ago. We have pretty good water here in the Western side of the PNW but there are times it does get a build-up on things. Brings back the shine and smoothness to the porcelain tile and basins.I would like to see an applicator that actually keeps the goop on the tile instead of getting centrifugally forced up the brush though, tough to spread where needed on the round flat attachments.

This product works! I have tried every possible product to get rid of hard water stains on my shower glass and I was unsuccessful - I tried all available cleaners, vinegar - both regular and concentrated, sand paper, razor, etc. This actually works but it takes a lot of effort and multiple brushes and multiple attempts.There are no instructions on how to use this product and I couldn't find any product demonstrations on this website. After trial and errors, I found the best method was to dab a blob of the paste on a wet dish scrubbing sponge and apply it over the glass and then wear eye goggles and use the brush to scrub the glass immediately (don't let it try up). and stay at each spot for 20 seconds or more for it to be effective and don't hesitate to use pressure. After using it 4 or 5 times, the glass will get clear. I didn't see any scratches on the glass.

This worked great for water/mineral deposits in my shower. We have well water. The custom metal, stone, and glass shower is 4 x 4 feet. The shower and well are seven years old. Water testing did not reveal any minerals out of the desired range, but we were unable to get the mineral deposits (scale) off of the interior of our shower with CLR, Comet, Bar Keeper's Friend, Soft Scrub, Ceramabrite, Limeaway, or vinegar. All three brushes worked well except for in the smaller corners and crevices where I had to use a very stiff, nylon hand brush the size of a toothbrush. I mostly used the larger of the three brushes, and by the time I was done, the bristles were about 50% shorter, but none had fallen out. The cleaner has a nice, but strong, minty smell. I used the cleaner and brushes on glass, grout, caulking, metal, stone, and plastic. It took the paint off of the screw heads holding the custom metal, shower door frame, but the frame itself was not damaged. It also took the paint off of the metal drain. I was surprised that it didn't scratch the plastic or metal parts of the shower head, cord, or control knob. It did not damage or scratch the grout, but it did pull up some of the weaker areas of caulking. Initially, I thought it removed/damaged the finish on the metal shower frame, but I just hadn't thoroughly washed off the residue from the cleaner. I'm very happy that I found a way to get rid of those deposits.

I followed directions and did one of 3 panels on my shower doors. I actually did the panel 2 times. First time I used a lot of elbow grease. When that didn’t work I hooked up the drill to one of the attachments that came with my order. It didn’t say it was for glass and I was concerned with scratching but it did not scratch nor clean better than my hard work scrubbing by hand. Because the glass panels are beside each other it’s easy to see this product made no difference. If you have high levels of iron, plus hard water, I wouldn’t recommend this product

I was shocked at the effectiveness and the bundle was a steal! I have high iron in my water and the combination of the cleaner and silicone has kept my toilets spotless. Immediately removed hard water stains on glass shower doors. I will definitely buy again!

This is about the third review I've written in the last 8 years, but I love to read reviews, so I'm writing it for those people!WOW! This stuff is incredible! I just moved into a house that is 150 years old, and has been inhabited by old people for the last 60 years. This house was clean enough, but not deep clean. I am a clean freak. Before taking this top picture I had used comet, comet soft scrub, some green natural stuff, and scrubbing bubbles, and whatever else I had lying around. I just kept trying things. In fact, the top picture was taken while scrubbing bubbles were in it (so the white foam is those bubbles. Imagine that sink being even dirtier because of what those bubbles are covering up, and the scrubbing bubbles also did nothing). I worked on this sink with these drill brushes and solution for about an hour. Nothing else in the house took me that long except this well-used OLD kitchen sink. House was last remodeled over 50 years ago. The sink now has a soft silky feel to it, and it looks SO much newer than it actually is!If you are thinking of replacing sinks or tubs because of hard water stains, I would use this first. It is worth trying. Even with the length of time it might take, it doesn't exhaust you because you're not scrubbing with your arms, you're cheating with the drill.

I had an issue with delayed shipping, but received and used the product. I’ve tried other products unsuccessfully, and the bad hard water stains on my shower walls are now completely gone! Recommend using a brush drill attachment. This stuff really works!!!!!