I think this recipe is fairly well-known/common, but I thought I would share it here because I use it every time I get an ear infection (which is not that often), and it has cured me of all of them since I discovered it. One time several years ago I got a strange blister-like cyst in my ear canal, and this recipe cured that and brought almost immediate relief to the pain as well. The recipe is very simple: just combine equal parts of vinegar (I use regular white/yellow vinegar, but probably any kind would do), and Rubbing alcohol (70-90%), and put a drop in each ear and let it run down into the ear canal. When I had the strange cyst thing, I got a Q-tip soaked in the alcohol/vinegar mixture and then pressed it gently against the bump in my ear canal. Like I said, it felt better almost instantly, after having bothered me for weeks. That's when I first tried this recipe. Since then I have cured several other ear infections (including one my boyfriend had, who also said his ear felt better immediately). Both ingredients in the mix kill germs and the alcohol also has a drying effect, which I think is important if you have fluid build-up in the ear from the infection or swimming, etc.
I have been using alcohol and white vinegar for 35 years with great effect every time. I keep a little squeeze bottle by my sink. The kind with the top that pushes in to close. I used half white vinegar and half isopropyl alcohol. I just put a few drops in one side and wait until it goes down all the way. Then do the other side. The mixture will not stain your clothes.