Guess what I save to start fires when I’m camping?
You got it, dryer lint.
Works way better than those “fire starters” at the store. Friend had already alerted me to the fire hazard of lint and being a camper himself, told me to save it for campfires.
I save it and use it to wipe the dipstick when I check engine oil.
Just throw it away rather than soiling a good rag.