Yes I'm suffering from same issue on the fuel/oil/temp gauge and speedo.
Usually clear when I set off but mists up as I drive along, starts clearing after a long while, but just as bad next time.
Was looking at old threads on this subject this afternoon and the best solution appears to be to move to California.
It drives me nuts and it seems to have been a Morgan 'feature' for a long time.
I'd love to hear a solution.