What is the best way to ensure the Rotor-Disc is properly sealed when using the Heat Sealer?

During the sealing process, the "orange Sealing LED" is On. When sealing is finished, the "orange sealing LED starts blinking and a long beep sounds”.  When the Rotor-disc adaptor has been pulled out of the Heat Sealer unit, wait until the seal has cooled down before removing the excess seal, which is about 20 seconds. Remove the excess sealing film by pushing down to detach. Never pull up on the excess film to remove it.