Remove the remains of the nozzle, then let the rocket dry out completely... The use a pair of needle nose pliers to twist the motor into itself to extract it if it doesn't come out on its own.

Oh, and welcome to the Goldfish Club!

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Dreaming of making the rockets I dreamed of as a kid (and then some).

"The Guide says there is an art to flying", said Ford, "or rather a knack."
"The knack lies in learning how to throw yourself at the ground and miss."

Launching is Optional... Landing? That Depends on Trees.