i know that this subject has been posted again but it didnt help at all its vague,anyways my question is simple for those who have done it and have experience if i empty the fire extinguisher by using it and all that am i good to go and open it?is there any danger of any kind of explosion after i empty it by using it?because i read somewhere in the net that you need to open it slowly and smoth and watch out and blah blah even after its empty..so is it true or BS?