Fido’s Ear Drops Cleaning your dog’s ears is an important part of looking after your pet. Fido’s Ear Drops for safe, broad-spectrum control of ear mites and minor bacterial and fungal infections in dogs and cats. Soothing glycerol cleans and softens wax. Use regularly for pets with problem ears. Frequent ear scratching is a common symptom of ear mites. Often you will see this causes discomfort, especially if they have ear mites over a prolonged period of.