Selling old router - Is a factory reset enough?

clankfu32

Honorable
Oct 3, 2013
128
0
10,680
I'm actually returning a complimentary Asus router that Sprint gave me but this applies to routers being sold to private parties as well.

Is a factory reset enough to make sure the new owner isn't able to retrieve my SSID and passwords? Or do I need to a more thorough wipe to be safe?

Asking because I'd like to use the same SSID and passwords on my new router.