I own my miner for two months, but I have been giving service to gas turbines for more then 3 years.My initial thoughts were as below.
If there is dust, there may be a red spot which may cause a fire.
There is mechanical vibration.Screws must be controlled.If they are loose there may be a problem with heat sinks.
I will also add compressed air cleaning to my list. I thank you very much for sharing your experience MarkAz.
A fire? Red spot? xD Well i suppose if you have huge chunk they could combust, not that there is much to actual catch fire if it get stuck on a chip but i very much doubt there's any spot on the miner that will accumulate enough heat to combust dust anyways.
In 1.5years i don't have a single screw that came loose. You can always check to your heart content till you realize its probably something you don't do as upkeep as they probably won't run away on their own in any time of frame that "upkeep" could be.
Just let some Watch Dog app check temps and check often to see if something red start flashing.