Guest Vzwlbepplo

From someone who's been caught mid-cooking with an empty cylinder too many times: The hot water trick works but be careful with the water temperature. I use warm tap water not boiling to avoid any risk. What I do now is keep a backup cylinder always connected via a double-burner regulator. When the first one empties I just switch the knob.

Also pay attention to sound! When you shake a nearly empty cylinder you can sometimes hear the liquid sloshing at the bottom. When it's completely empty it sounds hollow. And if you're using it for a gas geyser or heater the pressure drop will be obvious - the water won't get as hot. My best advice: note the date when you get a new cylinder and track how long it lasts for your household. You'll start to predict when it's about to finish.