2 adult females, sisters, scratching around the face & head & ear twitching. No gunk visible from exterior of ears. Could they be scratching at some irritation in the ear canals themselves? I've been through a 2 week course of Canaural Ear drops but the problem still seems to there. They do seem to have a lot of those 'nodles' you get in cats ears. Could these be making a difference? Any ideas?