just checked it out and still good meaning hearing a rattle when shaking acording to helmes.i got almost 80,000 and they say check and replace every 30,000.should i replace?or is everything fine as long as it rattles.

 

If you want to do it that way (the cheap way) Blow in one side air shouldgo right threw.,blow in the other side no air should pass threw

 

A new one is a whole 4-Bucks. Why don't you treat your baby to a new one. It's cheap enough to do two!