To prevent recurrent otitis externa in frequent indoor lap swimmers during winter, a gentle ear drying solution or specialized ear drops can be used. Acidic ear drops with isopropyl alcohol and acetic acid effectively promote moisture evaporation while maintaining an acidic environment that hinders bacterial growth. A case study showed that this approach significantly reduced ear infections among swimmers during winter months, highlighting its effectiveness.
Honestly, a diluted vinegar rinse after swimming seems to work best. It keeps bacteria from growing without drying out your ears. I had a friend who swims all the time try this, and his usual ear problems never showed up all winter. For anyone with sensitive skin, it's a simple fix that actually works.