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.
Some serious illnesses can cause your breath to have a strange chemical odor. The smell is different from halitosis, or bad breath caused by poor oral hygiene. The breath of someone with uncontrolled diabetes, for example, may have a sweet or fruity odor. It's a sign of a life-threatening condition called ketoacidosis. Liver disease may cause breath with a musty, ammonia-like smell. An intestinal blockage may cause the breath to smell like feces. Breath that has a fishy or urine smell could mean kidney failure. Other possible causes of unusual breath odors include sinusitis, lung abscess, and esophageal cancer.