
Hi June,
one of mine had recurring ear problems as a youngster and it turned out to be diet related :( I know you've been there, done that and got the T-shirt but you may have to look into the ingredients your youngster is on.
We had numerous drops and ABs over a lengthy period before it was finally determined that it was allergy related.
Not much specific help as it could be almost anything but perhaps worth looking in to.
regards, Teri :)