Remote Keyless Entry - Poor function

I just bought a 96 Camaro conv. the rke works marginally. some button presses (lock) work well, while others (unlock and trunk) do not. Is there any thing I can do? I have alread taken apart and cleaned the RKE contacts with alcohol. Seems to have helped some.... Perhaps just tired out...

I would appreciate any advice. Do not want to do the whole dealer service thing...