When I make bay leaf, arnica, or rosemary salves, I generally use the stove top or crock pot method, but when I made a plantain salve, I cold tinctured in oil for over a year! The plantain salve is for drawing out splinters, and it really works. I've used it to draw out ingrown hairs as well and it has drawn out what I presume are keratin deposits (or perhaps calcium deposits as my father gets those. But they look like keratin, aka "milk spots" to me). It's über potent, and not to be used anywhere sensitive like other people use a more mild plantain salve for. I read some article about someone using a plantain salve near their eyes and I was like AHMIGAHDS NO until I realized normal strength probably wouldn't attempt to pull their eyeballs out. 😉😂