this is the way.
re: lowering humidity, i have two computer fans running inside my wine fridge in the warmer months. you just snake a thin usb cord through the door and it works perfectly. has the added benefit of greatly increasing the efficiency of the unit itself as the air circulates better. just search for usb computer fans.
Keep in mind that even if the fridge air temps swing like this the temperature in the bottles is hardly moving, probably on the order of 1 degree. At least that’s how I reassure myself. Haven’t noticed any protruding or sunken corks either so that would be the other main concern.
I would worry about messing with the door seal doing this, I guess if you get a flat cord it would be ok?
flat is fine but you can run super thin single wires through. the seal isn’t affected.
Thanks! Curious also as to how you have the fan oriented to increase airflow. May try this, I mean why not at this point? 
i have one velrco’d to the top and one on the bottom. the fridge fans are in the middle (one of those two-zone bois) and i leave them on all the time.
i use these for drying ducks and chickens in the fridge too. proper fridge not wine fridge
How do the fans lower the humidity? If they are in an enclosed space, you’ll just be moving around the humid air.
enclosed, but not hermetically sealed so there’s air exchange with the outside world. the unit by default tries to maintain a temp and humidity within a range and its ability to do so is dependent on ambient conditions. if the ambient conditions are such that it’s struggling, then an internal fan moving the air makes it more efficient. think how a convection oven works.