From the Mollenhauer website:
"A new wooden recorder has to be played in. Give your instrument time to get accustomed to the moisture and warmth that comes through playing. You can use this time to explore and become familiar with the unique characteristics of your recorder.
Play it daily in the first three to four weeks – but not for periods longer than 20 minutes. Look for slow passages to play. Explore and savour every individual note: what makes each note sound best? Experiment with various dynamic levels. Find the limits of your instrument, but don’t tax it too much in the high registers."http://www.mollenhauer.com/en/useful-informationI think Loren is correct though, the recorder should play fairly easily into the higher registers even if it does 'tax' the instrument, so perhaps it needs a voicing adjustment.
V