Tushy Classic Bidet Toilet-Seat Attachment (White/Bamboo Knob) The part of the Tushy that goes under the toilet seat lid is a bit thicker with this older Tushy Classic Bidet Toilet-Seat Attachment (White/Bamboo Knob) ($89). You'll also see that you have to turn the knob on this version to "nozzle wash" when you want to clean that part. Image Source: amazon.com Tushy Classic Bidet Toilet-Seat Attachment (White/Bamboo Knob) $89 from amazon.com Buy Now