For cleaning you don’t always want the highest PSI possible as this may damage the surface or object you’re cleaning! For a good clean, anywhere between 70 to 90 PSI is more than adequate and will be able to remove dust very quickly and easily, especially with a narrow and precise nozzle or a brush attachment to collect up dust as it is blasted away. Some compressors offer far more than this and if you use these for cleaning they should be used very carefully, with a good bit of distance between the surface being cleaned and the compressor nozzle.