I have a similar problem. Our kids left a gate-opener fob with us while they went away. But do you think we can find it now they have returned? We have a defin

I have a similar problem. Our kids left a gate-opener fob with us while they went away. But do you think we can find it now they have returned? We have a defined place (a box marked "keys") where we put things like that. but for some reason or other, it's not in there. Any suggestions?