I am sorry to say that for some kids those things are low on the priority list. I sometimes wonder if it is because they feel like no one cares what they look like since they don't understand them anyways. Some of my students have used it as a defense mechanism to keep others away from them so they don't have to bother trying to be nice to people they don't really want to be with. Unfortunately, this often backfires and draws more attention to them because most of their peers are obsessed with their appearances at this point.
I unfortunately don't have any advice, but wanted to let you know that you are not the only one having these issues.
Good luck.
