I show you why you remove RED Plug for 5 Needle Keurig My K-Cup Universal Reusable Filter MultiStream Technology https://amzn.to/3DlUWNu I brew a cup of coffee with the Keurig K Supreme plus smart coffee maker with the Red thingy or Plug installed and with it removed. With the red plug or stopper installed the Reusable k Cup leaked water. I remove my red plug and it works great. The instructions do not tell you if you should remove it or leave it installed. Item model number 5000351186 Please help support my channel by using my Amazon STOREFRONT My Amazon STOREFRONT: [More]