If you have ever been crappie fishing and noticed the lure just wants to spin when you pick it up out of the water. It is usually because the tail is bent and the lure is going around in small circles.
You can fix these baits by taking a small pot of boiling water. Remove it from the heat and add the crooked plastics for one minute. Remove the plastics and place the bodies straight on a small metal cookie sheet an place in the frig for one hour.
Boiling water is not hot enough to dissolve the plastic but it will allow the lure to be molded into the new shape.
I usually add a few drops of cod liver oil to the plastic package. It makes it easier for the baits to move around without getting twisted.