Condensation inside packed, refrigerated food
There is something wrong with your refrigerator, and you need to get it fixed. 

Most likely, the temperature inside is rising into the danger zone (>40F), and subsequently falling as the fridge cools. This change in temperature causes the condensation.

In a discussion on ChowHound, there were many potential issues discussed that could be causing your problem. Take a look at my list below and determine how comfortable you are inspecting each issue. If you find one of the problems and can fix it, great.

Most likely, you need to call the manufacturer if the fridge is under warranty, or call an appliance repair specialist to come take a look. Don't wait too long, it's quite possible some of your food is spoiled because of the issue.

Possible problems causing the issue:


bad thermometer inside fridge 
door isn't sealing tightly enough
freezer needs to be defrosted
drain is clogged
could be something else entirely