First, I make sure all my computers are built with quality cases that have removable, washable air filters.
Second, I make sure my fans are set to provide slight positive (over) pressure to ensure all (or 99% anyway) air being sucked into the case comes through those filters.
Third, since eventually, dust will enter the case interior, if needed, I lug my systems outside and use an
upright air compressor and a soft, *natural bristle paint brush to clean the electronics of heat trapping dust. HOWEVER - there are special considerations that MUST be adhered to when using an air compressor on electronics.
- The compressing process WILL create condensation inside the tank. This condensation collects on the walls of the tank, then runs down to the bottom. If allowed to build up, nasty, rusty water particles can be spewed onto your electronics - never good. So periodic draining is required and all air compressors have a petcock valve on the bottom of the tank for this purpose.
- Ensure the compressor is an "oil-less" type.
- I prefer upright compressors to keep any condensation way down at the bottom.
- ALWAYS - as in EVERY SINGLE TIME - use a inline moisture and particulate filter when cleaning electronics (or air-brush painting birthday cakes or faces). The use of a filter is even more important if you fail to abide by #2, and don't have an oil-less compressor.
- Never see how fast you can make a fan spin - you can easily exceed design limits and damage the bearings (I use wooden glue/Popsicle sticks to hold the blades stationary).
*Natural bristles are typically made from horse or boar hair. Synthetic bristles are typically made from nylon, polyesters or both. Natual bristle brushes are less likely to generate static or cause ESD damage to your sensitive devices.
For the record, the very first time you wake to find your car or truck has a flat tire you will be glad and feel totally vindicated and justified for spending the money on are real air compressor, instead of one of those little blowers (which, IMO, do not generate enough pressure) or cans of dusting gas. Of course, if you live in an apartment, an air compressor may not be practical.
One last thing about those cans of compressed dusting gas - they are NOT filled with "air" and therefore should never be called “canned air”. Instead of safe-to-breath air, they contain difluoroethane or a similar gas. These gases are typically used as refrigerants and can be extremely hazardous if inhaled. In extreme cases, it can damage the central nervous system, or even be fatal. So use in a well ventilated area or better yet, outside. Note in some jurisdictions, these are controlled substances and sold in a controlled manner, similar to how cans of spray paint are sold to [hopefully] dissuade abuse through “
huffing”.
