How did you get the rupper case such clean?
I have a similar looking Fluke 87.
/PeLuLe
A good way to clean this cases is to use WD-40.
Looks strange but trust me it's working.
Alex
I would not use any petroleum or sillicone based solvent not wd40, gigaloo etc ... it may attack the yellow plastic surface in time.
Flukes are made for industrial use (in the serious sense, not marketing wank). If they were susceptible to any common solvents, it would be widely known. I think any household solvent is going to be totally okay.