Kahr Newbie here. Came into possession of a used PM9 and during my "familiarization" break-down and cleaning, was surprised to find it all oily in the striker channel. This thread has confirmed what I suspected - that it should be clean and dry in there. I'll be going back to rid it of lube once I finish this post.

I've noted all the variations on how to apply lube in this thread and would like to add another that I sometimes use (weapon dependent): In hard to get-at places that require only a light lube to simply protect the surfaces, I apply the oil generously then blow it out with my air compressor. That removes all but a very fine film that will prevent corrosion.