my now 7 year old had a terrible time as well. Even after getting tubes, we continued to have infections, although we did see some improvement after the tubes. That said, we had amazing luck with him and my younger son with chiropractic. The chiropractor explained that the way kid's ears and tubes are situated can be a breeding ground for infections, but that with adjustment (very gentle, not the "cracking" most people imagine) the drainage can be improved as well as strengthening their little immune systems to be better equipped to fight off the infections. As a side note, we discovered an amazing benefit behaviorally and continued to use her long after the ears were no longer an issue. We often found that when our oldest was having behavior problems and couldn't control himself, if we went for an adjustment, she would find that he was way out of alignment on a particular side and the problem would improve dramatically. When we brought this to her attention, she did more study and found that there's a whole school of thought in chiropractic on this front and has started using treatments for kids with sensory integration disorder and autism for the neurological benefits.
I don't know where you live, but we saw Stephanie Maj at Community Chiropractic in Chicago.