Metal Mouth Message Board

Does anyone know the best way to clean your retainers? I have finished with my brace and i have got 3 clear retainers.
I just rinse them and brush them under cold water however it still has a bad smell and it has white patches and looks dirty.

I've read on a few websites you're supposed to use any traditional persulfate cleanser (Retainer Brite, SonicBrite, Efferdent, etc.) or non-persulfate cleanser (DentaSoak).