Phone keeps losing wifi?

[WPCentral Question]

For some reason my phone keeps forgetting the wifi at home.
That it doesn't stay connected all the time is fair enough, has to save battery, but when I put my phone back on it doesn't reconnect to my router, instead I have to put in the password again every time (long and annoying).
Any idea whats wrong here?
I'm really paranoid since windows phone seems very graphics intensive and I don't have unlimited internet.

 

[ShinraCorp]

I had that on my 920 before but I don't remember how I solved it. I think all I did was a soft reset? Have you tried that?