i read an article in rc411.com
http://www.rc411.com/pages/howto.php?howto=52&page=1 it says, after i burn up the excess fuel, i have to apply denatured alcohol in the tank and swoosh it around a bit, do i have to do this after a daily run everyday? what are the examples of denatured alcohol? is WD-40 a denatured a/c?