listen to dave,piss on it.did you try bug and tar remover
finger nail polish remover is 90% acetone
I have not tried anything, yet. Symptoms like restless leg syndrome etc. had me up and down most of the night so I am just now getting rolling here at 8:15.
I plan to try the WD-40 then Dawn soap ideas first, but if I need to resort to the pee on it I will be glad that I have a 'hose' that will reach up there without me having to climb up