I've heard of people using all kinds of crazy stuff for removal of fusible web. While I've not had a major meltdowns (sorry, couldn't resist), using scraps seems to work for me. I just heat the iron up on high since mine has to be set at a medium setting for heat n bond and once it's really warm, I run it back and forth over spare freebie pile fabric until I get it all off.
Hope this helps, RETRO