I clean Nebo's whenever I take him to work.....which is at least once a month. How often they should be cleaned kind of depends on the dog. If the dog is prone to ear infections, or has heavy ears that hang down (like cockers, hounds, etc.) they should be cleaned more often. You can look at the ear and see if it's dirty usually...there will be a buildup of brownish earwax and sometimes an odor.

When I clean the ears I use an Ear Cleaner (available at pet stores)....just pour a bit on a cotton ball and swab it in ear. If the ear is very dirty sometimes you have to use 2-3 cotton balls.