I found the redness on the creases of my baby's neck as well. So I tried Baby Bee's Dusting Powder by Burt's Bees and she no longer has that problem. Corn starch is an ingredient, but it worked for my baby and I heard it worked for other babies as well. There must be some natural herb in that powder that kills fungus b/c her neck started to smell funny, but after using it, the redness and smell went away. I put it on her after her baths. Make sure your baby's neck is dry then apply to her neck ( I dip a cotton swab into the powder and while she's lying down, I lift her neck and put it on the creases). Now, she even looks up for me b/c she likes the powder. :) I use it on her underarms and even behind her ears. If your baby has chubby thighs, you can use the powder there too. ;) Good luck!