Persistent Ear Infections? It Might Be a Fungus, Not Bacteria Aspergillus, a common ear fungus, can survive months of antibiotics because antibiotics don’t kill fungi. In this case, boric acid in isopropyl alcohol (1 tsp in 16 oz, 5 drops twice daily) changed the ear’s pH, clearing the infection in just 1 week. Left untreated, it can spread, damage hearing, and cause chronic inflammation. Always check with your healthcare provider before trying any remedy. Message us for more details or visit ou