Just give it time to do it's magic, then let it sit out or put some heat to it to speed the evaporation. At you ratio you might try 1 oz after 2 weeks, then evaporate as much as you want. Without heat it will take a while. I have never tried this so be warned, but I suspect that you could put the pyrex measuring cup, with the weed and alcohol in it, on the burner of a coffee maker and it would speed the evaporation. Just keep an eye on it so that it doesn't all evaporate. Strain out the weed by placing small pieces of coffee filter on a fork(held with a rubber band) and scoop out the weed from the measuring cup.
Then strain it through a garlic press back into the measuring cup.