This goes with the previous posts about Jewelweed:
I was asked what to do to remove the oils from exposure to poison ivy if you do not have jewelweed around. Using soap (not a detergent with synthetic surfactants, but actual soap made by saponification) within 2-3 hours of exposure or asap, and lathering up well and leaving it on for a minute or two in between, three times in a row, will almost always get rid of the urishol oil. I've used homemade goat's milk soap and, in an emergency, Fels-Naptha with good results. The goal is to pull the oil out of the skin. The process I shared above dries out the skin, but that's part of getting rid of the urishol oil. Plantain and witch hazel soothe and help heal a rash from poison ivy, too.