PETs require little maintenance once placed in the eardrum. For a few days after the procedure you may be instructed to use eardrops. Dr. Pasha may ask you to keep your ear dry (use ear plugs when swimming). Diving deeper underwater or into dirtier lakes and rivers is more likely to cause swimming sinus infections.
You should also follow-up every 3-6 months to have your ears examined and make sure the tube is functional.