Hi I recently purchased a klarstein beerkules dispenser! Already used the 3 co2 cartridges provided with a few teething issues but got working and enjoyed a few barrels of ale from my local brewers! I ordered some 16g unthreaded co2 cartridges from co2cartridges that arrived today! As I connected one to the regulator chamber and tightened it the chamber started to freeze over! I’ve left it a hour and now when I turn the pressure knob on to dispense beer there’s nothing coming out and no sound of gas! I don’t believe cartridge is fully empty so I’m a bit reluctant to try n change it! Any ideas?