I've tried cotton balls in the ears but it seems like it just soaks up and draws water INTO the ears which defeats the purpose. Like others have said, I just fold the ear flap down to cover the ear while rinsing the head. I've tried drying solutions but Bullet hates it, and Rio hasn't really had any ear issues. Vinegar sounds like a good natural solution, but not too keen on the smell!
__________________  With love from Rio, Bullet, & Alice |