Hi Capt, thanks for letting me have a play!
Looking at the above pictures again, has the track changed?
The curves after the powerbase, I remember being a bit different.
In reply to the question at the top of the thread, I'd suggest:
-wipe the track with a damp cloth (microfibre cloths are good)
-sand the tyres
-come and have a play here
I've go the track up and running again, so when you're free...