Yes, flushing with water is the important part. Temperature matters too, warm/hot water works better. I swim a lot too and get a blockage at least once or twi

Yes, flushing with water is the important part. Temperature matters too, warm/hot water works better. I swim a lot too and get a blockage at least once or twice a year. I used peroxide on it to varying results, sometimes it would work, sometimes not. Then I read that hot water flushing after the peroxide is the key part, and that works consistently for me now. I do it by getting in the shower and aiming a stream of hot water into the ear for a minute or so.