I know it is important to make sure you wash/dry thoroughly all the nooks and crannies, and I pay special attention to around dd's neck/chin. I have just picked her up to put her to bed and noticed that she has a 2inch long red raw sore in the crease of her neck under her chin. It is shiney and looks wet. I have cleaned it with water and patted dry, but how do I treat it? It must look worse than it feels as dd is more than happy for me to touch it.