As more and more people are cracking open these packs I feel obliged to mention one thing (besides the obvious safety hazard). The PCBs in the pack are coated with a thin non-conductive protective film which is pretty rugged. For the most part you just need to keep reasonably clean (absolutely no metallic/conductive debris but unfiltered air is fine). The only exception that I follow is with the BCU cover as it has the Humidity sensor and the sample port should be carefully taped off to prevent any debris or condensation from entering and causing unexplained issues later. Just FYI to the community.
Caution, the PCB coating is good but don't abuse it as there's lots of circuitry that if exposed to dust, condensation, high humidity, skin oils, etc, can cause a fault in the system. Even using a voltmeter/oscilloscope on some circuits can cause an overload, fault or component failure.