I have a Pro-Form 220c Hydraulic Cylinder based stepper. After about 10 minutes of use the right cylinder stops offering any resistance. I suspect that it's related to it getting hotter.
With normal usage they are supposed to get hot, so this isn't unexpected. I don't feel a noticeable difference between the two cylinders. A new one costs about $60, but before I do that, I was wondering if it was possible to lubricate it?
If so, with what?