[chasingthewind]

If you search YouTube for the channel Extreme Deer Habitat and the video How to Never Get Poison Ivy again the presenter asserts that hard scrubbing with a cloth will remove the urushiol oil after contact and that it will prevent a rash.

[DontchaKnowit]

Lye soap also works. Dawn probably works too. Any strong surfactamnt. Just gotta remove the oil within a few hours