1/4'' air spray nozzle

thingiverse

You can use a basic, compact nozzle to blow away dust easily. This tool is much smaller and less complicated than a standard blower gun. Simply place your thumb on the nozzle tip to shut off airflow. Note that this technique only works effectively up to a certain level of psi pressure. However, I found it extremely useful for most everyday applications. Print the nozzle with its opening facing upwards and include a brim of 10 units or more. I discovered that printing the nozzle best results in using three outer shell layers and no infill at all.