Sounds like an oatmeal rinse is the right thing to try. I use that same detergent without problems, but I guess they are all so different. Someone else on here was having problems and suspected what they used to clean off the wheel. I know people can develope allergies to things that never were problems before, could be the same in hedgies. Keep an eye on it and if it doesn't improve, looks worse, or is really bothering her, I'd take her to a vet.