If you notice your bag is losing its seal, double-check that there isn’t too much liquid in the bag, any small pinholes or punctures. Also check for wrinkles where the bag is sealed. This is a result of poor bag placement in the machine. To assure that the bag is properly placed over the heater bar, make sure top of bag is hanging over the Removable Drip Tray so that the appliance can make a proper seal.