No need to get out your screwdriver... here's a handy little device if your insecure.
Hidden Camera Locator
Easy to Use - Easy to Carry - Hidden Camera Locator
Designed for quick and easy checks while on the road or out and about. This is a small device that is easy to carry and is designed to make sure your hotel room, apartment or dressing room is not being watched by hidden cameras.
Has built in circuitry to prevent cellular phone interfearance. Works well in locating low power output hidden cameras.