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.
Not a big fan of this product. About the third time I used it the sponge cleaning tip literally fell off. Of course this was only days after the 30 day return window closed so I'm stuck with it. I won't recommend it and certainly won't buy another.