Sorry for post deletion.
We just had someone saying how vasseline is completely safe to use, siting examples of how their cube and friends cube were fine.
Here are the facts...
Vasseline DOES rot cubes. People who have had success with it are LUCKY. Vasseline is not designed to be used with some plastics, in particular that plastic that rubik's products are made from! SOME cubes are made of other plastics that are safe, but I couldn't name them. And even if the cubes themselves are immune, the cores rarely are. Vasseline slowly breaks them down and weakens them.
If you have lubed with vasseline, please disassemble and clean with a dry cloth as best you can. Only use lubricants that are safe or come purpose made for cubes.
100% silicone spray (I use halford's own brand bought in the UK, but it's available from most auto-shops internationally)
Jig-a-loo (supposed to be good, but I can't get it in the UK)
Lubix (purpose made and supposed to be awesome)
Rubik's lube (ships with some DIY cubes from the Rubiks.com shop)
Maru lube (only comes normally with maru cubes / puzzles)
Avoid WD40 - it will weld your cube together.
Please take off topic discussion off this forum. Thanks.