Baby smelly neck and the use of baby powder

Marie • Hello, my name is Marie, I'm 27 years old and I joined this website the moment I found out that I was pregnant. This is my first pregnancy and I'm praying for a 100% healthy baby boy or girl 😊
My son has a smelly neck I'm quite sure it's from the milk that goes in there... I'm hearing that baby powder is bad to use so what can I use?