I just tried this too. I wanted to have a go with the fresnel lens in my kit, but all I succeeded in doing was burning away small chunks of the cotton ball- no smouldering and no flame. Same effect with the magnifying glass on my SAK. One spark with the spark-lite and whoomph!
WARNING & DISCLAIMER:
SELECT AND USE OUTDOORS AND SURVIVAL EQUIPMENT, SUPPLIES AND TECHNIQUES AT YOUR OWN RISK. Information posted
on this forum is not reviewed for accuracy and may not be reliable, use at your own risk. Please
review the full WARNING & DISCLAIMER about information on this
site.