I will buy this product again.
The instruction book advised that this piece should be changed every three years. I had read and seen videos that this piece was difficult to remove. That turned out to be the case. A tool to assist would be really helpful. I used WD40 to loosen the piece then waited 24 hours. The WD40 worked a treat. The piece came out easily. The replacement went in easily. I am going to remove and clean it every month, now, to avoid any problems in the future. I would recommend this product.