It does seem that the wax in your son's ears is worrying him. Normally I would tell you to go ahead and use the oil to soften the ear wax in his ears, but I would need to be sure that his ear drums have healed completely from the grommets. They probably are normal and have healed, but there is just a small possibility that his ear drums may have small openings where the grommets were placed. So the best would be to ask your ENT to remove the wax and at the same time he/she can tell you if your son's ear drums are normal now.
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