I really like the fig pop method (see figbid article below). I’ve only done about 12 cuttings from various figs over the last two years, but I’ve only had 2 duds. Whatever method you’re using, the keys are keeping the rooting medium just damp enough, keeping the tops from drying out, and having temps in the proper range. The fig pop method basically makes the first two items a non-issue. So long as you have the right moisture level in the soil to begin with, you don’t have to worry about the levels fluctuating until you start to see roots and leaves. Since the plastic bag keeps the moisture levels from fluctuating, you can also just use the same medium you plan to grow them on in. One of the big failure points I notice is with folks rooting them in open pots, the medium dries out and they have to water. It’s very easy to end up with conditions that are too moist.
Edit: One other consideration, give the cuttings a soak in a 10% bleach solution. It will sanitize the surface, making it much less likely to have any issues with mold or rot.
@Jsacadura has a method utilizing a plastic tub that has similar virtues: