Mower deck going bad

[big al]

I live in southeast La. and myself and a few neighbors have purchase new John Deere 100 series mowers from John Deere and within 3 years decks have all detereated and I contacted John Deere and they told me that I was washing my deck after use and it would not dry right. I WAS WONDERING IF THEY HAD MAYBE BAD METALS at one time where all decks were going bad.

 

[scott47429]

my mom bought a 100 series John Deere about 5 years ago and it still looks brand new