1. Avoid weighing the cylinder by lifting it. Most people feel that when it is lighter than when it was first refilled, it means the quantity of the gas has reduced. It is not true.
2. Avoid shaking your gas cylinder for checking your gas level. Some people as well do shake the gas cylinder to determine the remaining quantity. Note, this method is very dangerous and can lead to gas leaks which usually leads to fire and explosion.
Shaking your gas cylinders to know the amount of gas left inside your gas cylinder, is not only dangerous, but could cause it to explode.
Most times we shake our gas cylinders to know if it's finished or not, that is a dangerous thing to do. It could explode and be suicidal!