TomTom Memory Cleaner
Gaw --
I thought exactly as you do, but I suspected something. When I reset the TomTom 730 to the factory settings, I started it up very far away from any sattelite signals. But, the TomTom knew where it was. It remembered its previous location!
So, I knew that it kept some memory even when it was reset. Give it a try.
Then -- I found something called the "Clear Flash Utility" at http://www.tomtom.com/updates/ttgo510-710.clear_flash.exe.
While I do not have proof, I think it writes some information to Flash, which is not reset when you return to factory settings. In my case, I now believe that the Bluetooth settings are kept in flash.
Gaw --
I thought exactly as you do, but I suspected something. When I reset the TomTom 730 to the factory settings, I started it up very far away from any sattelite signals. But, the TomTom knew where it was. It remembered its previous location!
So, I knew that it kept some memory even when it was reset. Give it a try.
Then -- I found something called the "Clear Flash Utility" at http://www.tomtom.com/updates/ttgo510-710.clear_flash.exe.
While I do not have proof, I think it writes some information to Flash, which is not reset when you return to factory settings. In my case, I now believe that the Bluetooth settings are kept in flash.