I remember reading another method I think I'll try next time. Put some cotton balls in a zip lock bag with a little (2 tsp per 10-12 balls, or something like that), then spend some time squishing them around. Someone check me on this, but the ideal concentration is well short of saturation. In other words, you want some vaseline in / on the balls, but not so much they won't fuzz. The cotton ball catches the spark, the vaseline provides more fuel. If the cotton ball is so soaked with vaseline that you can't fuzz it out, it'll be hard to catch the spark.