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Title: Buy the newer design
Review: I've been using this product for over a year. I have to say it does a fantastic job of keeping your toilet bowl clean without forcing you to replace the flapper in the tank every few months because the other in-tank solutions destroy it.But, this is the original design. It's impossible to keep from leaking. The O-ring doesn't fit correctly; I added a rubber band to help seal it but even that didn't totally fix the leaking problem.Why is leaking bad? Two reasons. First, if it comes out fast enough it will, and has, shot right out of the tank (past the lid) and onto the floor. Second, it fills the tank faster than it fills the bowl so you don't have as much water in the bowl.I recently replaced this design with the newer one (#35113). They totally redesigned it and it works great. Cleans your toilet and it doesn't leak. Make sure you buy the new one, not this one.
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