I went to do a small welding job only to find that my Hobby Gas weld 15 mix was empty. Now I turn my Gas off at the bottle after welding every time, However do I have a leak ? or did I leve the gas switched on between the job I did the previous Day ?? I cant remember. So I went and bought a refill £43 !! Later on today I'm going to check for leaks. If non found I dont know where my Gas went as I dont believe I left the Gas switched on over night.. there is always something !! lol............ Operation find escaping Gas.