Some years ago I developed a wax buildup in one ear which was severe enough to cause difficulty hearing people on the telephone, when it was used with that ear. I tried the Murine self-treatment multiple times and it was ineffective. A visit to the ENT dr. fixed the problem immediately and completely. Surprisingly, he found no wax buildup at all in the other ear. I now see him annually, and each time he removes a significant amount of wax from one ear or the other, usually not both.
He has indicated that in his experience there is no predictability or consistency as to when, how, or in which ear this tends to occur, even for the same person from one year to the next.
Regards,
-- Al
