It's a mystery, but my right ear gets clogged and the left ear is clear. I thought I had gone deaf in my right ear and went to the doctor. My out-of-pocket cost for blowing wax out of my ear was $100. Holy moly! I figure this purchase has saved me $260 for the 3 applications included. It worked great! Disgusting, but great. Easy peasy. I put drops in for 10 minutes and rinsed out the problem. Highly recommend!