I use a miniPC on my TAK to automate my equipment (cold-mos camera, filter wheel, focuser controller, etc.).
All the devices are connected to the 4 USB ports of the miniPC.
Yesterday I had problems with my focuser controller (Starlight Instruments) that stopped working (ASCOM driver error: "Value was too large or too small for an Int16").
No way to make it work again (detached-attached USB cable on both side, rebooted the miniPC, etc.).
Today (at 13:30 CET) the device is back. I start thinking that dew could be a possible source of problems.
As I'm automatizing the whole observatory (currently in my garden) to move it in a better place this could be very annoying.
Any idea how to protect the USB ports from dew?