It is a used treadmill nordick track 1000 and is making a ticking sound when the belt is going at about 3.0 speed>I used a little wD40 in the edges of the roller and it stopped for a few times if riding but started again. Is there somethin serious or is it just getting older? I s there anything else I can do. I've stopped riding it till I can figure this out. PLease help. Ann L.
