Tell you what you could try, it worked with our pair. Get some wax worms and hold one with thumb and fore finger and hang it in front of his face. The worm will wriggle which your beardie won't be able to resist. If it works do another one a bit later.
As soon as we put the tub of wax worms in front of the viv chaos takes over the viv and all social order is abandoned
this stuff is like chocolate to them.
2 Bearded dragons ( Jaffa and Queenie)
Lime Green Preying Mantis ( Gretna) RIP
Siamese Fighting fish/Betta ( Bertie)
Whippet cross Staffordshire bull terrier ( Brind)
Green Horned Frog (Norman)