For anyone who has gotten water, shampoo etc in your ears, you know how excruciating an ear infection from moisture can be. I make up small batches just for those times. When the hydrogen peroxide stops making " expoding sounds " in the ears, make a fresh batch and redate. Also helps to dissolve ear wax build-up. Saves many trips and money to the Doctor when you can prevent the infection. Can be used daily. Like any infection, if a temperature, drainage, redness or pain has already occured, please see your Doctor.