Use a glue board for rodents, Walmart has them. Place them along the walls.
Once you got the little bastige, you can get it off the glue board off with liquid soap or hand lotion. But work well, be patient and allow the soap or lotion to soak under. I have taken geckos and small snakes off these boards without problem. Of course, many monitors too and some were very very funny.
One was a 30 inch whitethroat. He tried to take a gecko off the glue board and got his nose stuck. Then he just gave up, hahahahahahahahahahaha
Anyway, once you learn how to get the animals off safely, these boards work wonderfully. Cheers