Ok lads - never ceases to amaze me some of the obscure stuff people on here know so I'll give it a try !

Got a weekend bag that I use, where the zips are a little bit stiff and I want to free them up a bit. work perfectly, just a bit stiff. What can I use to 'free' them up a bit ? Sensible ideas needed chaps

Oh, and I can't use anything oil based as the bag is a genuine Louis Vuitton that cost me a feckin' fortune....!!!!

Help !