You are not alone, my 17 year old son with ADHD is exactly the same. I felt better about when I realised his room was next level messy. This is not the mess of your standard teenager, it is the mess of someone with an executive functioning disorder. Once, I realised he is literally not able to keep his room tidy it took the emotion out of it. I scan the room for food scraps and wet clothes and then close the door. I have kindly reminded him that if he does not bring his clothes out to wash then that is up to him. This has actually worked over the last few months. I also recommend this book "Organizing Solutions For People With ADHD" which I borrowed from the library. It is never going to look pristine but with help she can get rid of the food scraps.
