I had issues with bubbles for such a long time, after tinkering with the settings for what seemed like an eternity I finally found the right settings which left no bubbles. So I have a 5in1 TBK408 and my settings are as follows; Pressure 0.5 Vacuum Time 30 seconds Laminating Time 30 seconds Temperature 60 degrees Celsius bubble remover 10 minutes I hope this helped :)