Ah, of course. Every doe's milk is visually checked in a strip cup before milking and wiped down before and after, as well as teat dipped, but there is normally no extensive cleaning of the inflations between does, no. The risk is certainly there of course, however it's fairly minimal, and in four years we've not had any mastitis spread between does. We have of course had cases of mastitis here and there, perhaps one or two a year; luckily since I spend so much time with these does it gets caught fairly quickly, and they are taken "offline" and milked at the end of milking (or hand milked), to indeed prevent the passing of infection, and the inflations are indeed cleaned between does (if there happens to be more than one "offline" doe) in that case.