It's necessary to remove the GE dishwasher spray arm before you can clean or replace it. The GE spray arm uses a clip inside the base of the assembly, as well as a left-head thread. Once you remove the GE spray arm, clean the individual holes with vinegar and water to eliminate any mineral deposits that may be causing poor water flow.
Turn off the circuit breaker to the dishwasher. Although you are not working directly with any electrical components, it is always a good idea to turn off the power supply to the appliance before making repairs.
Open the dishwasher door and pull the bottom dish rack out of the dishwasher. The rack will simply roll out of the dishwasher.
Turn the spray arm until you see the notch at the base of the spray arm assembly. The notch goes through the base. Locate the small clip that secures the spray arm to the dishwasher hub.
Insert a flat-head screwdriver into the notch and pry the clip away from the hub. Do not bend the clip if you are not replacing the spray arm. GE only has the clip in a complete replacement kit. Remove the clip and position the screwdriver all the way through the notch in the spray arm base so that you can grab the screwdriver on both sides.
Grab the screwdriver with both hands and turn the spray arm assembly counterclockwise to remove it from the dishwasher hub.