What can cause the remote start to stop working on 2005 Chevrolet Malibu

Already replaced the batteries in the remote but it still does not trigger the remote start.

Asked by for the 2005 Chevrolet Malibu
Have you another remote to try? I have before taken apart the remotes and cleaned the circuit board in remotes with circuit board cleaner you get in Radio Shack. Perhaps a better cleaner that is safe for electronics is for cleaning air flow meters available at auto parts stores CRC product # 05110
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