My band Trebuchet were playing our Christmas set last weekend, outdoors (under a gazebo) in cold and quite humid weather.   Several reeds on my Wheatstone 48 key steel reeded English stopped speaking altogether, which made some tunes interesting! The reeds which went silent were predominantly on the push, although I have no idea whether that's significant or just coincidence.   24 hours later after standing back in the house, all reeds are working fine and there doesn't seem