belt

My MK2 3dr Clio has a squeaky rear left seat belt that drives both me and my passengers insane! Is there anything I can squirt in there or how would I go about getting access to the mechanism in order to clean and lubricate it? Thanks!

hi, first post so I hope I don't upset any one. I have just done a service on my car including full Oil/Filter etc.. I would really like to change my aux belt and possible alternator belt also but I cant find anything online to help. my car is a clio 1.2 2005 with air con and power steering...