CLR PRO Calcium, Lime & Rust Remover, 32 oz. Spray Bottle, Pack of 2, Quickly Removes Calcium, Lime, Hard Water Deposits and Surface Rust Stains

Removes soap scum and hardwater mineral buildup from stone easily! Spray, wait 5 minutes, swirl around using scrubby side of sponge and rinse! Rinsing takes a bit of time to wash away all of the thick sludge which becomes loosened. I noticed if I didn't wait for the mist to settle it irritated my throat and made me cough. This is the only product I have found which works on the rough surface of stone shower walls surpassing even straight ammonia and the black and decker circular scrub brush.

I live in a rental house and the toilets weren't filthy, they were freshly cleaned when I moved in but years of lime and calcium build up had left rings at the water line inside the bowl and a line down into the bowl where the water came in to fill the toilet bowl.I followed the instructions and with a little bit of scrubbing (not it much) the toilet bowls look good as new.However, for me, it was a hassle to have to turn the water off and drain the bowl. I was concerned that the knobs being so old they might break off in my hand and I didn't know where the main line to the house was. I didn't think ahead. The inside parts weren't what I was had seen before. But good old YouTube helped me.The owner was surprised but happy I managed this.They look so good, not like they are never cleaned.

Soaked calcium deposit around drain in sink for hours. Didn't remove a thing.UPDATED REVIEW: I sprayed the area around the drain several times a day for about a week. Just let the CLR sit. Poked at it with an orange stick once in awhile. All deposit is gone. So...it does work, just takes time.

Pleasant smell and it does the job. Best product I've ever used to clean off tough calcium buildup. We purchased a used glazed pottery birdbath that was covered with layer upon layer of ignored calcium buildup. We wet the birdbath and then sprayed the solution on heavily and let it set for 30-minutes. We then took pumice sticks and started to scrub the buildup. On the lighter coated areas the buildup came off easily. the heavier coated areas took much longer to work. After two hours and six pumice sticks later, the birdbath looked brand new. I won't hesitate to buy more when needed.

First of all this is not a review of the CLR cleaning solution. That works well. This is a review of the spray bottle container. Or maybe more specifically the seal. Both seals on the 2 pack failed and the liquid product leaked out into the packaging. Unacceptable!

I struggle with hard water stains on my shower doors and have tried numerous products. The industrial strength works much better than anything else I've used. It loosened the caked on hard water to scrub off although in some spots it took more than one application. Each bottle was in a plastic bag to reduce leakage. I highly recommend.

We bought a house in Florida. There were terrible calcium deposits on the granite counter tops in the bathrooms and fixtures. Regular CLR didn't work but the industrial strength worked great! It did take 2 days to get the deposits off completely. Very happy with the product!

My son's shower it hideous. No idea how he manages that much build-up.This stuff eats through it better than anything I've tried before.Bonus, it doesn't wear out your trigger finger spaying it. Not sure how they did that...or how the others made it such a pain.With other brands, I spray the area, scrub, rinse, repeat, often several times. With this, one spray is enough for most, sometimes a second for really thick areas. Never really have to scrub.