this is what i would try.
Get 2 peices of cardboard. some duct tape. a slice of potato.
Basicaly what you do is get a slice of potato that can prop the two pieces of card board up. like so.
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....!!!!!......
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(the "-" is card board. the "!" is potato. the "." is duct tape.)
Cover the bottom piece with duct tape, Sticky side out.
You want this to be small enough that your lizard can't get in there and get stuck. but you want the cricket to get stuck.
If you lizard is small i wouldn't do this.
This trick worked for me cuz i have a Knight Anole who doesnt go on the ground hardly ever.
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Later,
WhisQuila