Broken zipper... Alternative?

I knew the candle wax trick could be used to make drawers open and close smoothly, but i didnt know about zips,,,,, nice tip
 
Defiantly be trying the candle out on the zip this weekend but I think I'll piss the wife off cos it's going to be one of her fancy ones she has around the house

Well it works but I'm in the dog house now...