Disclosure: I received this product free for review, however all opinions are 100% my own.
We live in a house on a well so the build up in our toilet is the worst I have ever experienced in my life. The water rim gets a solid grit level around it and I have never found anything that could take it off. No matter how much I scrub or how long I scubed with my toilet bowl brush it doesn't clean. The first time ever, I have found something that works, the Icky Stick. The overall feel of this stick working similarly to a traditional pumice stone for your feet, only it's for your toliet.
It uses a gentle abrasion to scrub off the film and leave your toilet bowl as clean as the day you bought it. I am highly impressed. I didn't have to use any product only the stone. I would highly recommend this product for any bathroom. My only potential critique is that it should come with a plastic cover or some sort of stand so you have somewhere to lay it after. I don't like the idea of setting anything on the floor behind the toilet or in the cupboard after it's been in the toilet.
If you need one of these for your house as much as I did head over to www.groomindustries.com to grab one for yourself you will not be disappointed.
I received one or more of the products mentioned above for free using Tomoson.com. Regardless, I only recommend products or services I use personally and believe will be good for my readers.