That`s such good news.
If he seems better today I would bring him home, birds deteriorate very quickly in the vets becoming depressed and if they are not going to do anything that you can`t do yourself, I`d have him home.
Sounds like a reaction to something, maybe even something he ate combined with the aftershave and polish, you have to be so careful don`t you.
I`m really pleased he`s looking well xx