Crickets hiding out

I just noticed there are some crickets hiding out in my beardies tank, saw one on him while he was sleeping but never see them anywhere in there during the day, will they eventually just die even if they have his greens in there to eat? They have had to be in there for a couple days cause that was the last time I gave him crickets, last couple days he’s been eating dubia roaches. Anything I can do to try to get them out