A couple weeks ago I attended an open water clinic at Blackridge Reservoir sponsored by US Trisports. After swimming I met a guy (I wish I could remember his name) who was telling a couple of us about some homemade ear drops he made to use after swimming in the reservoir. The drops are supposed to help drain water out of your ear canal and also kill any bacteria that may be in the water.
I remembered him saying that it was a mixture of vinegar and rubbing alcohol, but I could not remember the vinegar to alcohol ratio. After a quick search online I found several recipes for the drops, all of which suggest a 1:1 ratio of vinegar and alcohol. (Here is a link to a recipe on Instructables.com and another on Recipezaar.com)
I generally do not have problems with water in my ears, but the water quality at some of the places I have been swimming is questionable. I am going to make a batch and test it out on my next swim and will post the results. Has anyone else tried this? Did it work for you?