Besides CS you can do what my mom did to us and we never got ear infection. She put drops of warm Castor oil with garlic in our ears every month once and continued if we had colds. Warm a teaspoon of Castor oil and whole garlic to it once garlic look brown stop, take out the garlic and the oil cool down a bit. Touch it with your finger and see if it is bearable.
Put a three four drops in both ears and press in a cotton ball. This was done before bedtime. You may do this for a week and see how you feel.
After your Antibiotics course finishes, please eat regular plain yogurt everyday to get the your flora back to normal.