It may be helpful to give a honey soak to make sure everything is moving through smoothly. When my frog was off food, I noticed that he still had the occasional small bowel movement, likely from eating shed skin. Keeping her on paper towels is good as it'll be easier to monitor.

Otherwise, I would start by reducing the visibility out the sides of the enclosure as much as possible. I've often heard the suggestion to cover 3 out of 4 sides with dark paper or fabric, but I've found the more the better. Covering the sides will help the frog feel more secure, especially in a mostly bare enclosure.

How long do you leave the crickets in for?