At a plateau

Hey guys. I've had my MGX for a few weeks and I seem to be at a plateau. I have no problems with insertion, relaxing, and have even had some nice warm sensations starting in my gut and radiating out. But most of the time this ends up with a really nice 'regular' orgasm. The Super O has been ellusive. I've read all the instructions and have tried everything I can think of to get better results, but I feel stuck. Any advice?