DS has had lot of ear infections too, three weekly from the age of 3 months old. He is nearly 8 now and still gets ear infections probably about 4 a year now (slightly optimistically). He has seen ENT consultants since he was 12 months old and tried everything!!!
Oral antibiotics did very little except upset his tummy so eventually insisted on drops only. Not all ear infections are bacterial, some are fungal and there is also a range of bacteria that can cause them so it is worth getting a swab done for persistent infections which should give the antibiotic that will be most effective against the infection.
They can only put grommets in when the ear drum is whole so not possible when there are perforations. We found one window which allowed one to be inserted but it did not make the problem go away but lots of people get an improvement from this operation.
Cranial osteopathy has been fantastic for pain relief, drainage and over all constitutional strength but alot depends on the skills of the osteopath and it works along side the other treatments we have used including antibiotics when necessary. PM me with your location and I will see if I can recommend anyone. You need an osteopath with paediatric training.
We also tried (and still use) homeopathy but again, it is not 100%, however we have had many ocassions where ear infections have cleared up without antibiotics and discharges that have stopped within 24 hours of giving a remedy, almost instant pain relief with some as well.
When he was little, DS was quite ill so we have also seen a number of acupunturists but didn't see huge improvements.
He was a very snotty little boy with loose bowels and prone to stomach bugs (vomiting and diahorrea) and chest infections as well as the ear infections. We thought dairy might be an issue and used goats milk formula and then goats milk as a drink but he ate cows cheese and yogarts. At 2 and a half he had some food testing done and he was shown as intolerent to a whole host of things, mostly put down to his body being stressed. We had a fantastic nutritionist who helped with his diet advised on suppliments (pro biotics, high dose non citrus Vitamin C, DHA / EPA long chain fatty acids and stomach enzymes to help heal his gut and get his body working again. It has made a huge difference to him.
Over time I have been able to reintroduce all foods and now control the amount of wheat and dairy in his diet, though I do wonder if I excluded them completely, if it would be the final piece of the jigsaw. We still continue to see an ENT consultant, an osteopath (I have seen quite amazing results from osteopathy on various childhood hiccups), a homeopath and periodically a nutritionist and I think they all help to minimise the number of infections he gets but sadly, no one person has a magic solution.
I think all children are individual and there is not one answer that fits all and the answer is bloody hard to find!! But I hope my story helps.