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My 996 '00 C2 tail/rear spoiler makes this coffee grinder noise when opening or closing in a static check while being activated from the footwell toggle switch (After flight check). Although, this noise is still not audible by the cabin occupants at applicable highway speeds. The spoiler works as intended but its laborious movement feels like one or more bearing/gear(s) are getting tired or require some grease of some kinds: silicone, synthetic, not sure? and how/where to be applied, even more ignorant ... Any insight, from this august group, would be appreciated! Merci! Martin