Unless you're rebuilding the
coils, there really isn't a reason to touch the coil it's self.
Dry burning will remove the "gunk". Normally a rinse 1st with your favored way to do so.. (hot water is mine), a good dry burn to dry the wick and get the
coils glowing to remove the "gunk" (pulsing the pv on and off until the coil starts glowing, and continued until you get the coil to an even glow) and a final rinse and let them dry is the basic part of coil maintenance.
If you're going to "touch" the coils, it would be with something like a toothpick to help fix hotspots (coils touching and getting way too hot in those spots).
"Scraping" is more than likely going to A- crush the coils B- cause hotspots C-pull a coil leg into a position that can causes shorts.
