Hello! I have the exact same problem, although I do have some crusting and itching once in a while in the same place behind my right ear. What I do is when I shower in the morning, I take a pair of rough bath gloves, soap them up, and gently scrape away the dead skin.
When they are absorbed, they can be released in sweat through skin. Foods like yogurt, onions, garlic, red meat, cabbage, spices like coriander, and asparagus may result in increased body odor when consumed in large amounts. When you have a diet rich in proteins, you may have vinegar like smell on sweat.
Diabetes can make the breath smell of nail varnish remover. Liver failure can make the breath smell of raw fish. A bladder infection can cause the patient's urine to smell of ammonia. Rubella can make the sweat smell of freshly plucked feathers. Schizophrenia can make the sweat smell of vinegar.