Miniature Schnauzer inner ears must also  be checked on a regular basis.
Brown waxy buildup, or redness, may be signs of an infection, and an ear cleaner from your vet may be required.
Regular brushing of your Miniature Schnauzer teeth will help prevent harmful bacteria produced by excess tarter.
Health
First and foremost remember regular visits to your vet with your Miniature Schnauzer will help ensure health problems are caught early, and treated. Regular vaccination and worming are a must, grooming helps ensure healthy skin, as does a healthy diet, and remember to keep their bedding clean.
Miniature Schnauzers are generally known to be a pretty healthy breed, living a long life, and not usually showing their age till very late in years. A good thing about pure bred pets is that breeders work to screen carriers of known diseases out of their breeding program. Veterinary science can identify many diseases that are known to occur in a given breed, and with this information, careful breeding can hopefully rid any problems. With this said it's important to tell you of possible health issues.

Progressive Retinal Atrophy
causes the retina of the eye to deteriorate slowly. Symptoms may not show until your Miniature Schnauzer is three years or older, beginning with night blindness,eventually blinding your pet. Annual eye testing and certification of breeding dogs is a must for Miniature Schnauzer breeders to reduce the risk of this disease