paraphrased...from "Earthly Bodies & Heavenly Hair" by Diana Falconi:
1)1 oz. herb to 4 oz. oil, use jar with tight fitting lid
2)shake daily, agitation maximizes release of herbal properties into the oil
3)let steep for at least 3 weeks, 6 is better
4)strain oil by placing a strainer lined with a thin cloth over a bowl, pour oil in, allow to seep, then gather ends of cloth together & squueze out any oil remaining.
The directions are different when using fresh herbs...
Thanks, FF, you reminded me of yet another thing on my list! :)