In a restaurant, usually the drinking glass is placed already on the table before you arrived. Depending on how populated this restaurant may have been, you don’t how long such drinking glasses are there. There’s only one things you should know: are those drinking glasses clean?
it is easy to determine if such drinking is clean or not. There should be no blot of water residue within and around the glass. But you cannot spot this immediately, you need to lower down your face to see some blot residue on it.
This actually happens after washing. If the the drinking glass was not put on dry cloth after washing, those droplets residue will not dry out down the cloth, instead, it will create a blot. it means such drinking glass was dried to way it should be.
Usually you can spot these water residues on the rim of the glass. if this happens, that restaurant is not maintaining a good health safety standards. Cleanliness is next to goodliness. Check out your drinking glasses to see for yourself.