Published January 08, 2020 07:35 How do I know when I am out of gas? Not getting enough bubbles? Check out the guide below for assistance. Related articles What do I do when my gas cylinder runs out of CO2? What's the difference between exchange vs back up carbonating cylinders? How do I get the perfect fizz? One Touch Manual & User Guide Why are the cylinders so expensive? It would be cheaper to buy cans/bottles.