Generally with shot brass that I'm going to reload, I may just take a piece of fine grit 3M scotchbrite pad or fine steel wool and pinched between my thumb and a finger, clean the neck of the brass. Don't regularly clean the primer hole, do it around every third firing or so. Kinda depends on the powder I've shot in it. Some is dirtier than others. Also, may take an old bore cleaning brush with a suitable diameter and clean the inside of the neck to rid it of any powder residue. Very seldom to I take out my sonic cleaner to clean my brass with it. Also, the case lub I use for resizing does a good job of dissolving any residue on neck or the brass for that matter. I wipe off any of this residue with a cloth that's often has some cheapo rubbing alcohol on it to remove the case lub and remaining powder residue after I've resized the brass. Then I reload it. And yes, I do own a Lee Decapping tool, but have no regular routine when I'll use it. Its a good tool to have.
