To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Broke off in the toilet first time is used it. I was cleaning the bowl and cleaned the hole leading to drain, pull back and the head snapped off lodged it the hole. I did nothing any differently than I ever had cleaning toilets for the last 45 years.