True, the rubber that holds the tube may be worn, or you are packing it too tight with tobacco and it's pushing it off. They are designed for a certain amount of pressure when it pushes out, then it slips off. Try it with less tobacco and see if it works better.
Inspect that the rubber piece that holds the tube.Chance's are that it is worn and needs to be replaced. it wont hold the tube all the way if it is worn. A quick fix is to cut a piece of eraser of a pencil and glue it to the holder.
Answers & Comments
True, the rubber that holds the tube may be worn, or you are packing it too tight with tobacco and it's pushing it off. They are designed for a certain amount of pressure when it pushes out, then it slips off. Try it with less tobacco and see if it works better.
Inspect that the rubber piece that holds the tube.Chance's are that it is worn and needs to be replaced. it wont hold the tube all the way if it is worn. A quick fix is to cut a piece of eraser of a pencil and glue it to the holder.