Here's what I use. The small silver one gets the "boulders" out, the big wood one gets all the gravel out (that's what I use for most of the dirt used), and then the coffee filter takes everything out so there's nothing left but powder.
I've baked the dirt ONCE in a cookie sheet. Found it was not needed so I no longer do it. The dirt has been sitting in a bucket for months, if not longer, and if there was "something growing" in it, the glue and alcohol are going to kill it.