Beaver Dam, do a search on wax moths here and you will get more education than you can digest in one reading. It is not a matter of thinking it is/was moths, you will know when you open the hives. Moths are usually the end result of another problem causing the hive to weaken or too much space after the queen takes a break from laying due to time of year.
Your location helps with answers. Much different here in Fl. than say, Wis..