I have been using the Kaboom Scrub Free Toilet Cleaning System for over 6 years now, since first reading about its predecessor, the NeverScrub Self-Cleaning Toilet System here on Cool Tools. I originally ordered the previous version through a special offer from the manufacturer and, a few months later they sent me a free sample of the newer current version. This is an update of the original article.
Everything in the original article applies. The main difference is a complete redesign of the little plastic tank which allows easier replacement of the disinfectant tablets. With the original design, the screw-top stuck mercilessly, eventually resulting in breakage of the screw threads from repeated forcing of the screw-top to open it.
The unit consists of a little tank which is clipped to the top of the water closet, just inside the lip of the tank cover, with water lines going from the flush valve into the plastic reservoir holding the disinfectant tablets, and out to the overflow tube of the toilet. The plastic reservoir is filled with bleach-like tablets, which slowly dissolve, releasing disinfectant into the toilet bowl whenever the toilet is flushed. Simple and effective. Unlike some other products, which release rubber-corroding chemicals right into the tank itself, and destroy the rubber gaskets, this product only releases the chemical agent into the toilet bowl. I have never had to replace any gaskets due to corrosion as a result of using this product.
As long as you replenish the disinfectant tablets, the product “just works.” It releases a dilute bleach-like solution into the bowl every time you flush. It has a reassuring chlorine-like smell (actually it’s bromine) and it keeps the bowl sparkling clean. Though you still have to do the occasional bowl scrub, it reduces the frequency of this task significantly. Once every 4-6 weeks keeps things nice and clean.
The interval between tablet replenishments, of course, depends on the traffic the particular toilet experiences. I add tablets about once a month. You can tell they need replenishment when the intensity of the bromine smell diminishes noticeably.
A side note on the refill tablets is in order. I made mention of this in a comment in the original article. Though the price of the Kaboom unit itself is modest, a pack of just 2 refills costs as much as the product. So if you replaced the refills once a month, you would end up spending about 6 times the price of the product every year for refills. The old razor blade/camera film profit scheme.
A much cheaper solution is to use Spa Brominating Tablets. One bottle lasts me about 2 years. Interestingly enough, the Amazon listing for the Kaboom product also refers to a listing for Spa Brominating Tablets. Someone must have read my recommendation in my comment in the original article.