Step 3: Cut
Cut a triangle opening on one side of the can. This allows for oxygen to reach the flame. Your can will have a sticky stripe of glue from the label (or a vertical line of label that did not peel off). Cut your triangle so that you cut this part off.
You could get all fancy here and cut stars and happy faces and pirates (whatever you fancy) into the can. I didn't. I just wanted my bathroom to smell better.