If you suddenly run out of gas while cooking, and you don't have any gas on hand, you have to be in a dilemma. If you can check how much gas is in the cylinder in advance, it is easier to get a new cylinder. Find out about two ways to understand the amount of gas in a cylinder. 

1. Dip a cloth in water. Wrap the wet cloth around the cylinder for a while. Remove the cloth and observe. You will see that one part of the cylinder is wet and the other part is dry. This means that the part of the cylinder that is wet contains more gas. The part that contains gas takes longer to dry.

2. Take lukewarm water from the tap and pour it over the cylinder. Then rub your hands from top to bottom. The part containing the gas will feel cold and the empty part will feel hot. However, do not pour boiling hot water into the cylinder. Pour lukewarm water.