Follow these steps:

1. Clean the canister by rinsing with proper solvent.

2. Spray the solvent through the gun while the shaking canister.

3. Wipe off the gun with a rag that’s been sprayed with solvent.

4. Repeat steps 1 – 3, then proceed to step 5.

5. Clean the air cap.

6. Oil moving parts with 3-IN-ONE® multipurpose oil. Do not use WD-40.