These were the things that my chicks liked. Dryer with no soupyness to the feed more like skippy peanut butter. Stirred up and no crusted top from the heat lamp. Not in a metal container. I hope that that helps.
It's sad when we see little cuties having a hard transition. Have you tried taking it out putting it in a different container and trying to trick them into thinking it's something new. Maybe take a picture of your set up and the FF container and post it.
I have 17 week and a half old Black Jersey Giants, and they got their first taste of FF this morning. They were a little hesitant at first, shaking their heads after the first taste, but coming back for more. I use the same glass "cookie jar" pictured above, and my first attempt was very soupy. Yesterday, I added some more chick starter to thicken it up. I put it in a trough feeder this morning, and sprinkled some dried mealworms on top to attract their interest. SUCCESS! They are now ignoring the other feeder with the dry food.