I went through 5 pairs in 18 months but it was because I slept with them in, and realized that was the source. Have had one pair die in 3 years when I don't sl

I went through 5 pairs in 18 months but it was because I slept with them in, and realized that was the source. Have had one pair die in 3 years when I don't sleep with them in, and I'm pretty careless (they fall on cement sometimes, get banged against the car door, etc).