Quoted from rmillman:It looks like the plastic post sleeves (first image) are no longer available, looks like there is a move to the rubber ones instead. Most of mine have some form of melting.
Those aren't melted, they're crushed down from over-tightening at the factory. My (and likely every) Earthshaker had the same issue, you can see the hexagonal impression that the metal post leaves on every one. The hole for the post was too wide, giving the sleeve pretty poor structural integrity.
Original aren't available, but what I did was order a bunch of these spacers from Marco. The hole is a little smaller but still enough to accommodate a #6 post, and the thicker plastic is harder to deform when tightened. They're 2 7/16" long, so each one will yield 2 sleeves when cut in half.
https://www.marcospecialties.com/control/keywordsearch?SEARCH_STRING=254-5035-00
And yeah, just give the light boards a good wipe-down with iso alcohol, that will remove all the dirt and coil dust.