The jaw line is definitely the most challenging area to protect while in the pinless halo. While we were using Karaya powder in the past, we realized that we were not able to get the skin dry enough after washing and the powder was almost creating a mud that stuck HORRIBLY to her skin. She had multiple areas that would bleed and be so red and irritated. It was miserable for her.
I was hesitant to change what the hospital set in place, but my husband convinced me to try going without the powder for a few days. Each time we washed the area, we tried to scrape out the caked on powder from the chin/jaw area of the halo. After several days, I noticed that it was significantly less sticky. We have been leaving off the Karaya powder for about 2 weeks now, and cleaning the area is SO much easier. It isn't sticking and there's been no bleeding. She is much more comfortable too!
One thing I have noticed is that the band across the forehead is very tight and hard to get down in to clean. Her skin is very dry there. I do my best, but I think she will probably need some moisturizer for a while once the halo is removed.