ASTM D3705 Test Method for Misting Properties of Lubricating Fluids
7. Preparation of Apparatus
7.1 Thorough cleaning of the apparatus with solvent is required prior to initiating a test on a new oil. For a duplicate test on the same oil, the mist generator should be thoroughly drained but the apparatus need not be cleaned with solvent.

7.2 Drain the oil thoroughly and rinse the generator with Stoddard solvent. (Warning - Combustible. Vapor harmful.)

7.3 Charge the generator with 2 L of clean Stoddard solvent and mist the Stoddard solvent through the manifold for 30 min. (Warning - Do not use the air heater while misting the Stoddard solvent.)

7.4 Drain the Stoddard solvent from the generator, rinse the generator with naphtha, and blow dry with compressed air. (Warning - Extremely flammable. Harmful if inhaled. Vapors may cause flash fire.)

7.5 Disconnect the mist head and remove the oil adjustment screw; rinse the head and screw with naphtha and blow dry.

7.6 Remove the reclassifier fitting and rinse it with naphtha; examine the orifices for deposits or buildup. If necessary, the orifices may be cleaned with a fine pipe cleaner.