I had a Forerunner 935 for more than a year(same charging port) and never had any issues with dirt/debris or corrosion. I wore it all day every day and only ever took it off to charge or shower. I don…
I had a Forerunner 935 for more than a year(same charging port) and never had any issues with dirt/debris or corrosion. I wore it all day every day and only ever took it off to charge or shower. I don't think you need it, and might actually cause some damage from holding water or debris in the charging port area. Holding moisture in the port area might actually accelerate corrosion.