MADER POWER TOOLS APW-VQA-130P Operating Instructions Manual page 38

Using included tip cleaner, or an unfolded paper clip, insert wire into the nozzle hole
and move back and forth until debris is dislodged.
Remove additional debris by back-flushing water through the nozzle. To
do this, place end of a garden hose ( with water running ) to the end of nozzle for
30-60 seconds.