The key to preventing moldy berries...

Berries are delicious, but they're also kind of delicate. Raspberries
in particular seem like they can mold before you even get them home
from the market. There's nothing more tragic than paying $4 for a
pint of local raspberries, only to look in the fridge the next day and
find that fuzzy mold growing on their insides.

Well, with fresh berries just starting to hit farmers markets, we can
tell you that how to keep them fresh! Here's a tip I'm sharing on how
to prevent them from getting there in the first place:

Wash them with vinegar. When you get your berries home, prepare amixture of one part vinegar (white or apple cider probably work best)
and ten parts water. Dump the berries into the mixture and swirl
around. Drain, rinse if you want (though the mixture is so diluted you
can't taste the vinegar,) and pop in the fridge. The vinegar kills
any mold spores and other bacteria that might be on the surface of the
fruit, and voila! Raspberries will last a week or more, and
strawberries go almost two weeks without getting moldy and soft. So
go forth and stock up on those pricey little gems, knowing they'll
stay fresh as long as it takes you to eat them.

You're so berry welcome!