Shop air compressor, no moisture trap. I just keep the nozzle a couple feet from the target, and drain its tank occasionally (they have a screw on the bottom fo

Shop air compressor, no moisture trap. I just keep the nozzle a couple feet from the target, and drain its tank occasionally (they have a screw on the bottom for that). "moisture" is only a problem if you don't let it dry off before applying power. Your circuit boards were washed multiple times before they got to you. In the before time, we'd disassemble our ModelM keyboards and rung the whole thing through a dishwaser. A more common problem is people not securing the fans on things; you don't want to spin them at compressed air speeds, ain't great for the bearings or the upstream electronics. Who protects their fan power lines with diodes?