This page was suggested to me after a bloodworm disaster which resulted in a 100% water change mere days after moving my axxie. I'm so glad I found it!
I found a massive coffee jar, cleaned it, and placed fresh bloodworm in. I popped the jar in and Toothless pretty much copied every axxie on here that didn't enter the jar - squished herself between it and the her sleeping jug, laid next to it, tried to sleep on top of it - but she could not be persuaded to go in. After a while she had a 'hmph!' moment and decided to go into her sleeping jug with her tail sticking out. She wouldn't go near it.
I hoped it was partially down to the fact it was new and also because the jar was taking up about a quarter of the tank on its own. This time I laid it sideways right next to her sleeping jug so she could still get in, and left it. No fussing, no moving it closer to her (as I was daft and thought this would help the first time). After two hours of repeating the same exercise from last night (during which time I could see her lying next to the bloodworm outside the jar, as if to say, 'there is a forcefield around my dinner, Mum!'). I had almost given up hope when I saw her sidle closer to the lip of the jar. I watched, hoping she'd use it, and five minutes of tentative nosing later, she was at the back of the jar, munching happily. I could have cheered! No messy bloodworm to clear up, less cloudy water and a minimal water change in the morning!
I've learnt it's a good idea to leave it in the tank for a bit before you add food so the axxie doesn't freak out, and also to make sure you don't block the entrance to their hides, as if they're a bit confused by the new addition they might need it. I also found that you've got to put it in there and leave it, rather than moving it like I did, and that you might need to desensitise your lotl over a few days to train them into seeing the feeding jar as a 'good thing,' like positive enforcement in dogs. I also found I couldn't leave the jar upright as the worms floated right out, but if it was laid down, the water pressure forced the worms to the back of the jar.
I hope this helps anyone who struggled with it the first time, like I did