Lube for Spin-Tech worm shaft?

We have a dozen Spin-Tech motors, shafts, and spinner plates on our lease. That's what was there when we got on it, so we've been buying parts and just keeping them running. We've tried WD-40 and then white (lithium) grease spray. Just wondering if there is something that would work better than lithium grease?

I tried calling them here in San Antonio, but no one answers and "voicemail isn't set up". 'Don't know if they're on their last leg, out of business, or just taking the summer off. I know they moved to a new location on loop 410, but haven't been all the way back down there in a while.

Any help is appreciated.

We use Lithium grease on both our Spin Techs and the Eliminators. The "thicker" grease that you apply out of the tube by hand seems to work better for that Spin Tech shaft, while the Eliminators do better with the spray.