Clearing your recorder’s windway is quite easy. Blow into the window while tightly covering the opening of the headjoint with your other hand simultaneously. Any additional moisture will be expelled at the beak, where you can wipe it off. Never, ever place your finger on the labium, which is where your lips go. Over many hours of playing, that labium is likely moist and elastic. If it is, then it’s weak and even the slightest force could bend it and change its angle.