Back in the late 60s early 70s when my brother and I were still at school, we were messing around with clapped old 2 stroke Villiers engined bikes up the woods, they regularly oiled the plugs.
Now our old dad had a lodge plug cleaner, that he'd probably inherited from his dad. this consisted of something that looked like the old metal cigar tube one used to get, but it was full of straight wire strands about 4 inches long, you screwed the plug into the open end and shook it. It was excellent and I wish I still had one, ive occasionally looked on ebay but never seen one.
Terry