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Lol, need to other side of that the part with the 4 white spots the book lungs. keep that clarity and do it to the other part.
take the molt put it in a small dish with 1-2 drops of dish soap let it set about 1 minute this will allow you to stretch it out.
After you are done can put molt back in a dish with just water for a few minute with no soap and it will get its water resistance back if you plan to keep the molt.