Here is a trick I read about somewhere, maybe even here. I don't know how true it is, but it is worth a try.

Supposedly if you run your fingers through your hair from the back of your head (so your hand is not seen), the cuttlefish will get interested and react by not only sticking around, but flashing colors. I know it sounds odd, but I think the flowing hair in the water gets it's attention. Obviously you need to have somewhat longer hair for this to work, but mabe you can improvise with something if you have to. Maybe some streamer like from an old school bicycle handlebar.

Hope it helps, if so I expect to see some video. I also hope you are having a great time and it sounds like you are.