If you want to have nice, clean ashtrays, you should take a look at the following tips:
Cleaning ashtrays
Oven cleaner
If there are still residues in the ashtray after washing it out, oven cleaner can help. Spray it into the ashtray and let it soak for about 20 minutes. Then rinse it out and it will be completely clean!
Cork and salt for porcelain
If there are nicotine stains in a porcelain ashtray, you only need a cork and a little salt. Wet the cork and dip it into the salt, then rub the ashtray with it and the stains will disappear without a trace!
Read also: Cleaning narrow bottles and vases
Photo by Sabine, meinhaushalt.at