Many moons ago, I use to aquire Dryer Lint, and dye it orange,(nothing fancy).Let it dry completly.Roll it into a cigar shape, and stuff it into a 35MM film canister, with a X cut on the top lid.Pull one end of the lint up into the X cut,and your good to go.Works very well, and you are also recycling
Lint floats on the thermals real well,just a little pinch will do!(Less is Best),dont float too much!
Works well even in fog,for a little more yardage,and doubles as a dry fire starter source.