Keeping Crawlers ??

What do you find for keeping night crawlers alive in for over the summer?
I've been using a mixture of top soil, sand, and coffee grounds.
( I find the fish prefer Folgers  over Eight O'clock or Maxwell House )
Then feeding them corn meal.

Crawler Cabin, hotel, or w/e Frabill calls it and their worm bedding with Fat and Sassy and keep it fairly moist and in the fridge... And some coffee grounds rarely. Just have to change the bedding every 2.5-3 months And wet a paper towel and put 2-4 ice cubes every trip out to keep the moisture.

Do you just put a hunk of peel in the box Boro?  Or do you cut it into smaller pieces like half the size of a penny or something?

So maybe keep them in a cool place you say and not the fridge? Seeing as a typical fridge is what 34-38°? And shock probably sets in causing shorter life...