Interior floor for Poopy Nano 2 (Silicone) - Old model

Can I clean the interior floor? <img src="https://cdn.shopify.com/s/files/1/0872/1068/8837/files/right-arrow.svg?v=1717669670" alt="caret" class="caret" width="" height="">

Does the interior floor stay in place? <img src="https://cdn.shopify.com/s/files/1/0872/1068/8837/files/right-arrow.svg?v=1717669670" alt="caret" class="caret" width="" height="">

Does this interior floor fit other models? <img src="https://cdn.shopify.com/s/files/1/0872/1068/8837/files/right-arrow.svg?v=1717669670" alt="caret" class="caret" width="" height="">