I put my airpods through the washer and dryer about 2 weeks into ownership (oops). They still work perfect to this day, almost a year later. I also run a couple miles every other day with them in, during the summer that means 90 degree weather and me drenched in sweat. Sweat is a non-issue for them.

Same experience for me, but I do understand that they don't snuggly fit everyone's ears.