What should I use to lube my film holders and grafmatics I use in my graflok back?

Candle wax?

or something other??
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When there is absolutely nothing else to do I wax the darkslides with Diamond Brite. You can find it in some hardware stores and most automotive stores. It tends to cut down on the static too.

So far in the last 15 years I managed to do this twice.

I was actually speaking of the holder itself..

So it slides easier into the back of my camera.