I have a small cricket keeper that I keep about 15-20 crickets a time in there. Replacing every 7-10 days. They keep escaping!!. I have taped the holes on the side now but sometimes one or two will get out. Finally They excape my 18x12x12 frog habitat. I guess they are squeezing through the area where the top lip is. How can I seal this. They are escaping before the frog can eat dinner.