There are a number of indications that show your cylinder is empty:
- When you press the carbonating button you will not see any gas going into your bottle of water
- Even after repeated presses your water is not carbonated
- The carbonating button may stay down
- The cylinder splutters, showing you have run out of CO2
Please note: SodaStream recommends that you keep a spare cylinder in the cupboard so that when one cylinder runs out, you simply swap the empty cylinder for the full one. That way, you'll keep enjoying fresh, fizzy drinks and can return the empty cylinder as you order your next gas refill.
If you still have questions, contact Sodastream Customer Support at Sodastream Support