Hi, Blod's ears have some of the dark brown waxy stuff when I wipe them out but she isn't scratching or shaking her head. I've bought some Thornits but I am unsure of dosage. Should I apply it twice a day until no more waxy stuff or once a week as a sort of maintenance dose? What do you think? My old springer had terrible trouble with his ears and had numerous operations, I would hate Blod to go through that.