lost water monitor

[erantheking21]

hi
my water monitor as escaped for over a week and i couldnt find him.
i went to sleep for the afternoon, i check him before and i pet him and put him back and close is cage, i woke up, but he wasent inside..when i was sleeping i heard some noises of nailons, but i thought it was nothing, but when i woke up i saw my cupboard open and a shirt with nailon on the floor, so i i immditaly tought he was going to this area, and this area was very close to his cage....
he has a rectangular basin cage that close with steel, with brench
he probebly clime on the brench and squeeze himself between the steel
its the second time he's done it already, in the first time i looked every where for him and wasent a clue, after a week he was showing up in my bad, he probebly was hiding inside a place without any access between the cupboard and the wall, its a very old cupboard so i dont know how many hiding place their is, even for a smart pet like monitors.
their is two problems.
1.during the time i was sleeping. i open the window(very small amont of it) but the window is in the other side of the room, and he had to pass me, or even under the bad, and to clime some things, monitor like to hide nearby, so i dont know what to think, i check in my roof in the top in the same day but didnt saw anything.
2.my door room isnt down, and there is a small place that he can squeeze under if he realy want..but agian, like i saw he was going to the other side, but i check in the rooms nearby, and my balcon, and nothing...no lizard
i put some mice in some places, and near the room, even mice sound to get him out, but no monitor
its over a week, from saterday, i am concered for him

the temp is 20-27 now, but still
1.how long he can go without food?
2.where can he be?
3.what can i do?