Hayes Stroker Ryde brake lever not returning to normal position?

[RSV_Ecosse]

My Hayes Stroker Ryde front brake lever isn't returning to its normal position after you squeeze the lever. You have to sort of 'flick' it back out with the back of your fingers. Brakes are fine and were bled a week ago, plenty of bite. I have read that there is a fairly simple fix for this involving the rod which goes into the master cylinder and greasing it. But I can't find any idiot proof instructions for exactly how to do it.

Anyone assist? Keep reading folk saying 'Yeah, it was a well known problem and it is a simple fix to regrease it' but no one really elaborates on how? Any assistance on how to fix this would be hugely appreciated!