I also meant to say that the fan will only compound the problem which is also being caused by your humidity being too low.
The amount of moisture in the air at 9°C/60%RH is 4.42g/kg. This is the same as if I ran my chamber, which is at 12°C, at 50%RH.
That + the fan on top = problems
I'd aim for 12°C with 70 - 75% RH if possible. Obviously, you know which things you can easily alter. Post back about the ones you can't and we'll try to help.
Phil