I use a dropper with 5 to 10 drops of 3% hydrogen peroxide, for about five minutes each ear.Morning.
Awakened today by a piercing earache. I had it last week and poured in some Everclear which seemed to fix it for several days. But now it's back with a vengence. I got swimmer's ear a bunch when I was a kid so this is familiar territory. Somehow I thought I was past all that; it turns out I couldn't be more wrong. This is the first time I've had to deal with serious earaches in decades and they're just as bad as I remember from my youth.