ROOTING FIGS IN A BAG
Take dormant cuttings approximately 8" long, and wrap in very slightly damp paper towel or newspaper, covering the entire cutting except the bottom 1/2". This allows the bottom end to "callus", which helps to prevent rot, when rooting. If you are doing several cuttings, roll the first one in the damp paper, then add one, and roll, and add, and roll, until you have 5-6 cuttings in a bundle. Place the bundle(s) in a plastic bag (a Ziploc or zipper-bag works well). Place in a warm place, not in the sun, with a temp of 70-80 degrees F. Check frequently for signs of mold, and air out the cuttings is necessary for a few hours. Re-moisten the paper if necessary (this is not usually needed if the bag is tightly sealed). Under the conditions of warmth and humidity, Roots will develop, starting as small white "bumps" called initials, and gradually growing into longer roots.
When there is good development of roots and/or initials, unwrap carefully, and pot up as follows. Use clear plastic picnic glasses, of about 45 ounce capacity. Drill poke 4-5 drain holes in the bottom. Place about 1/2 coarse, well-wetted Vermiculite in the bottom of the cup, insert the cutting, and fill the cup with coarser, well-wetted Vermiculite. Alternatively, use 50% Perlite and 50% Vermiculite. Place in a container (I use a plastic storage box), with a wire rack or other suitable arrangement, which will allow the water to drain through the cup and keep the cup from standing in any water. Return the cuttings to your warm place. To maintain humidity, you may want to partly cover the container to simulate a greenhouse environment. Allow for some air circulation to avoid mold. Water as necessary.
The most important element is providing overall humidity, without keeping the root zone overly wet.