Usually alcohol of this time period is too watered down to be of much use to clean someone... Even then not all alcohol can be used.
But generally speaking you need something with AT LEAST 40% alcohol content.
Sugar is also an antiseptic (counterintutitively). The sugar content of the alcholic beverage, this being in the natural course of things mutually exclusive with the alchohol content must be taken into account. If you are using a high sugar beverage, like wine or mead for instance then the suger content would add to the alchohol effect. The best antiseptic is actually something like honey because of all that concentrated suger.
Basically the effectiveness of a beverage depends upon it having a high suger or alchohol content in total. However a high carbohydrate content would have presumably a negative effect, meaning that something like beer which is made out of grain would actually cause infection unless the alchohol content was very high. So basically we have to do a breakdown of substances that looks a bit like this.
+Alchohol
+Suger
+Acid
-Carbohydrates. (no beer or plant extracts)
-Fats (no milk)
Acidic substances are best, so orange, lime or lemon wine would make a better antiseptic than regular grape wine. Mead would make the very best antiseptic since it made from honey but is also antiseptic.