Loud noisy zipper on grow tent, Homebox

Both the zipper and the burdock on my homebox (Ambient Q120) tent is very noisy :/
My secret jardin (Dark Room 120) do not make this loud noise.


Someone know a way to make them more quiet?
 
They make stuff for Sewers (folks that make their own clothes) "Zipper Ease" and the like, something more of a wax or silicon would probably better than say a petroleum lubricant IMHO as Petroleum products might be hard on the fabric and cause it to degrade faster.
 
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