Sounds like the bushings are not installed correctly. Did you try using the spare propellers and cages while you clean the old ones? Here is a step-by-step video on how to properly assemble the gyre including all it's bushings. We recommend you watch the video all the one through and then watch it again with your gyre at hand.
Taking it apart and assembling it back again usually takes care of the issue you describe...
http://blog.coralvue.com/maxspect-gyre-step-step-assembly-advanced-troubleshooting/