My Recorder is no Longer in Tune.

Do you think that the tuning of your recorder has changed? This can happen through normal playing: the interaction of moist breath and subsequent shrinkage (for instance due to dry atmospheric conditions in centrally heated rooms) occasionally prevents the wood from regaining its original measurements. The result will be notes that differ from the original pitch. In this case you should send your instrument to the Recorder Clinic for the tuning to be corrected.