hmm correct me if im wrong, but isnt it grease for isis, and clean with no grease for tapered........ best bet is to take the bb out, clean the threads and re grease, re tighten to the write torque and then clean crank tapers and bb and fit back on. If it still creaks, unlucky, could be the bb or cranks or even a dry weld on the frame. if your sure theres no cracks...