It’s hard when it is such a large house. When I lost a glider I turned off all lights at night and listened for it. It took hours but It’s advice I got and it worked. Watch where you step. Close all toilet tops. If there is a treat they like more than apples use that. Glider cages are not to be wider than 1/2 inch so you are probably safe there but I’m not positive and I don’t know how old your glider is.