NeverScrub! The Original Refill Cartridge, 1.0 CT

works good.

I have this cleaning system on four toilets in my house. Really keeps the bowl clean, reducing amount of times I have to do that chore. I like the way treated water bypasses tank as this also keeps chemicals from eroding the flapper valves.. Nice product and have been using for probably at least seven years with no ill effects... Recommended.

This is a good, quality product that works well.

This has worked better than any other product I have purchased for cleaning toilet bowls. You will occasionally need to scrub since no product is perfect, but it goes longer between cleanings than alternatives. Easy installation and then you can forget about it for weeks as it does its thing before you need to place a refill in when the crystals are used up. Very light bleach smell but most of the time I do not notice at all. I've been using this for years and have been happy with the performance.

I have used this product for years and it is great! It doesn't turn anything blue, which I appreciate, and my toilets never look dirty because they are disinfected with every flush. The most I have to do is swish the brush around once a week to prevent calcium buildup from our water. It is so simple to install and lasts for months. Yes, it is expensive for something you put in the toilet--BUT not having to scrub toilets is well worth it! I used to be able to buy it at Wal-Mart but now I only find it on Amazon. Yea, Amazon!