I let it sit for 24h in a very slightly warm place, strain, add fresh solvent (just a bit), shake to rinse the plant matter again, strain again, then evaporate in a double boiler (GLASS) over a pan of boiling water.
You MUST use a double boiler as the isopropanol fumes coming off the liquid are HIGHLY flammable and yes, I found this out the scary way.
Iso-hash is most often used to extract psychoactive compounds from trim (waste material left from manicuring the buds) on a small scale. IF you are starting with actual bud, look up 'honey oil'. If you have a large amount of trim, use bubble bags.
The chlorophyll is co-extracted in the iso-hash method and the resultant resin is dark green, gooey, and should be stored in tinfoil in the freezer, as it tends to take on a rather unpleasant smell not unlike a swamp on a hot day.