Sad cigar
First, make sure that the ashtray is solid brass. Check with a magnet - solid brass is not magnetic.
Next get the secret cleaning sauce - Ketchup
Apply liberally
Get an old tooth brush and some elbow grease
Voila! Happy cigar
The acidic property of the ketchup is just right for removing tarnish from brass and copper.
...now to get it dirty again. ;^)
