Why can't I see my home WiFi network?

Question

I have had my iPod touch for almost two years and have had no trouble with it - until today.  I am presently not connected to the internet through my home WiFi network and can't find my network in Settings/Wi-Fi.  I can see other secure (and non-secure) networks, but not mine.  I am presently sitting right beside my AirPort Extreme and am connected to it with my laptop.  So the Wi-Fi station is working.  My iPod has the same settings it has always had (Wi-Fi is on and Ask to Join Networks is off).  How can it see other networks by not my own?

Answer 1

Does the iPod connect to other networks?
Does the iPod see the network?
Any error messages?
Do other devices now connect?
Did the iPod connect before?
Try the following to rule out a software problem:                 
- Reset the iOS device. Nothing will be lost
Reset iOS device: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Power off and then back on the router
- Reset network settings: Settings>General>Reset>Reset Network Settings
- iOS: Troubleshooting Wi-Fi networks and connections
- Wi-Fi: Unable to connect to an 802.11n Wi-Fi network
- iOS: Recommended settings for Wi-Fi routers and access points
- Restore from backup. See:
iOS: How to back up
- Restore to factory settings/new iOS device.
If still problem make an appointment at the Genius Bar of an Apple store since it appears you have a hardware problem.
Apple Retail Store - Genius Bar
Is it this problem?
iOS: Wi-Fi or Bluetooth settings grayed out or dim
One user reported that placing the iPod in the freezer fixed the problem.
If not successful, an appointment at the Genius Bar of an Apple store is usually in order.
Apple Retail Store - Genius Bar