no no no no. sorry but, dont use any lube on the belts lubing belts just makes them slip, slipping belts mean things aren't being spun that should be, bad times! better to fix the problem that cover it up.
Oh well- I'm just going on what Alex did for me - of course he won'y have a scooby will he?!!!!!!!!!!!!!!
Surely - once they're tightened - and as tightened as a technician is prepared to go- then it fine applied sparingly - for cold weather conditions?