Not sure if your CO2 cylinder is empty?

• Make sure the cylinder is tight enough and retighten if necessary by twisting it to the right.
• If you're still not getting enough bubbles and if you don't hear a sputtering sound when you press the carbonating button, you may be out of gas.

*In 2020, we upgraded the Crystal Sparkling Water Maker with a new, silent valve. In these Sparkling Water Makers, it is normal to not hear a sputtering sound and is not an indication of the amount of CO2 left in the cylinder.