That's not entirely true. The propellant in silicone spray is petroleum based and will soften the plastic. If you disassemble, wait a few minutes before reassembling because you will leave fingerprints in the soft plastic. If you just pop out an edge, play with the cube for a few minutes to keep the pieces from fusing together.
It's not as scary as it sounds. Of course, silicone lubricants that aren't sprays (Lubix, shock oil, Maru) are safe.