There are some tests you can try to help determine if your CO2 cylinder is out of gas:
- Make sure the carbonating cylinder is tight enough and retighten it if necessary by twisting the cylinder to the right.
- If you're still not getting bubbles and if you don't hear a sputtering sound when you press the carbonating button*, you may be out of gas. You can get a new cylinder online or a participating retail location.
Pro-tip: SodaStream recommends having at least 3 cylinders on hand, so you’ll always have bubbles and so you can exchange 2 at a time.