How to Prevent:
1. Be sure to dry the ears out thoroughly, especially after taking a shower.
2. Make sure that the hairs of the ears canal and the outer are not too dense, especially some dog breeds with big ear in hot summer.
3. With deep canal of dog’s ears, regular inspections is indeed necessary. With simply dirty (with some buildup of dirt and wax), you should take a cotton ball with dipping into hydrogen peroxide to wipe your dog’s ear out. But with excessive ear wax or other problems, please consult medical treatment in time.