I have been using them for months now.I…
I have been using them for months now.I can't tell any difference whether they are there or not. Batteries die constantly. The app is poorly coded to the point where it kills my phone battery. Even then it never alerts when it's out of cleaner, if the batteries are dead, or if the toilet is stuck running. So I apologize for the negative review but if I have to clean the toilet just the same as without it what's it's actual purpose? There customer service is great they just need better engineers.