a: I don't like the smell of it as it sticks onto my iron
b: I don't like it sticking to my ironing board & then to everything else that I use afterwards
c: I can't stand that bubbling thing that happens when you use it.
So I have improved my ways with using it & most people has what is needed to be able to get the professional results in their kitchen pantry.
There are two phrases that you need to remember: "NON-STICK BAKING PAPER" & "STEAM OFF"
1. Using 2 sheets of NON-STICK BAKING PAPER, put the piece of fabric & interfacing (glue side facing the fabric) between the sheets of NON-STICK BAKING PAPER.
2. With the iron up to Hottest temperature possible for the fabric (most important) and the STEAM OFF, press down over the top sheet of NON-STICK BAKING PAPER.
3. Ensure that you cover all of the fabric & do this for about 1 minute moving the iron around the whole time with the STEAM OFF with reasonable pressure.
4. Once you have finished, you will be able to reuse this NON-STICK BAKING PAPER, just ensure that you keep the "insides" of them together & roll them up so that you never put your iron on the insides of the used NON-STICK BAKING PAPER.