I stopped using my joule for awhile and stored it. Having taken back out, I see that there is rush on the screw in part that covers the impeller and the plastic threads on the body of the joule. It's discolored but I was able to clean most of it off the stainless steel screw in bottom but the plastic is still discolored. Is there any recommendations on how to clean this? Is this suppose to happen?
As a note, the device was damp when stored.
