When using Wonder Lube 1000 Plus as a patch or black powder bullet lubricant, it may not be necessary to clean between shots. The bore will become “seasoned" as you use this lube. This lube does not mix with petroleum. It is wise to wipe any oil from the bore, before shooting. Not for cold weather use, it becomes solid at low temperature. You MUST clean after a day's shooting. We recommend Track's best Bore Cleaner, or your favorite non-petroleum solvent.