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.
Reasons for sour smelling night sweats? Multiple reasons: Night sweats: there are many potential causes to sweating at night. The term night sweats generally refers to excessive sweating at night related to a hormone imbalance. There is no one answer to explain the origin of sweating at night. Some common causes are: infection, some cancers, several medications, low blood sugars and a host of other less common reasons.