Depends which cache it is really, there are loads of different types of codes and cyphers
I'm sure if you're really stuck, the cache owner would give you a little hint if you send them a polite, begging e-mail
It's something to do with the Enigma.....Station X ???? groups of five letters. Complete gobbledygook!
Any ideas before I start grovelling?? Reading the logs, other people seem to have cracked it easily enough!
Am I just a dimwit???