Please, you don’t have to shake the gas cylinder to know the level of it’s content.
What you should do is to wet a side of the cylinder with warm water, not Hot Water, after a while the used top part will be dry(warm) while the lower part with gas will remain wet(cool).
The wet portion tells you the amount of gas left.
Most times we shake our gas cylinders to know if it’s finished or not, that’s a dangerous thing to do. It could be suicidal
