SDGuy you probably know better than me being I don't keep them in the refrigerator. My wife goes to the gym almost every day so I can't keep them there
I don't have to rinse them and they do spawn, only not nearly fast enough.
I cycled the trough with worms. But for about two weeks I have to rinse them every day and at first, twice a day.
Now I just add a small piece of paper towell once a week or so and suck them out to feed.
So, if you like, keep them in the fridge, but if you have a lot of them you can't keep them in there too long. At least I don't think so