I hope it is okay if I jump in here! I have a Cocker Spaniel and as you know they have the biggest floppy ears. Well my boy has never had any problems because I clean them out after every bath with a special "miracle" ear cleaner. Here is the link that will tell you how to make it!
http://www.zimfamilycockers.com/EarCleaner.html
I hope it helps and good luck!