ISO is basically self expanitory.
Take a glass jar with a lid
take bud/stems/trim
Throw in the freezer til its super cold
Throw bud/stems/trim into glass jar
Fill jar with 91% or 99% ISO alcohol til the stuff in the jar just starts to starts floating.(fill to trim line)
Proceede to shake like your an epileptic in an asian nightclub for roughly a minute.
I use 2 different micron mesh strainers and pour the alcohol mixure thru it into a 9" x 13" glass pyrex dish.
Stick outside or in front of a fan and leave it til all the alcohol evaporates
Scape with razorblade and enjoy =D