I had the same problem with 08 when I bought it last year. One remote barely worked and the other was dead.
I replaced the batteries and cleaned the circuit boards and rubber pads with rubbing alcohol. At first I bought those Silvania 2032's from the dollar store and same thing both remotes barely worked, so I bought Energizers and they both work great now.
I also checked the battery contacts for loose solder contacts, both were good though.
By the way I do this with all my remotes. My home stereo Harman Kardon was acting up had to push buttons hard to make it work. I cleaned the the contacts with rubbing alcohol and it works great now also..
Cheers.
Wayne.