I'm sorry, that's not very safe either. Many-a-stoner have sent themselves to the ER and burned their house down cooking oil like this. 

A couple safety tips: Use glass cookware, metal on metal causes sparks. Vapourized alcohol doesn't take much at all to ignite; like a static shock from your fingertip.

If you must, cook isopropyl alcohol/butane/what-have-you outside (still in glass) on a hot plate.