Rotafix is a procedure. Look it up on the youtubes. Should you perform it? Maybe on the fly if you don't feel like carrying a chain hhwhip but it doesn't tighten the lock ring. Stop skidding, go to a bike shop that doesn't suck and make sure your hub isn't stripped. Then buy a chain whip and lock ring tool, learn to use them, tighten everything, ride uphill, tighten everything, rinse and repeat. I know all this from experience having hamfistedly tightened a cog and stripped my hub.