Re: What is the best way to diffuse patchouli?
I suppose that's one of the things they mean by "tenacious"
I have used it with the plug in wall diffuser successfully -- certainly made the whole house smell like Patchouli. I wouldn't have expected it not to work in either of the diffusers you've tried. Probably "potpourri" style wouldn't be a bad idea -- drops of the oil around the house in flowerpots, on dried flowers and other plant material, etc. Me, I'd just put a few drops on a rug where I wouldn't notice and just let the room slowly fill with the aroma.
Being a patchouli lover, this may not be strong enough for you, I'm not sure...the plug in diffuser is inexpensive, portable, and I think worth a try.