1. is a good idea but I don't own the equipment. I'm not "that committed" to smoking and will stop if we come across another medication that works. I would really prefer to find something else: smoking brings some restrictions such as not being able to drive for the rest of the day after I smoke (although I feel fine and in charge, safety & respect for others lives trumps all)... so I don't want to spend the money on 'durable equipment' that I hope I don't need for much longer.

2. I don't know if there's some specific definition for "smoking tar" like what's advertised for tobacco products. I consider it to be any residue, but with mj it's characteristically a gooey solid or liquid when left to accumualte on equipment. It is not water soluble but a good solvent for it is isopropanol. If you examine the ends of smoked cigarettes rolled with tobacco and mj, I think you will agree that the stains on the paper used for the mj cigarette will be heavier and may even show through the paper. Whatever this is, it goes in the user's lungs and is likely not easily removed.