Omron MicroAIR U22 Instruction Manual page 16

5. Wash the parts (not the main unit!) in a warm soapy solution.
Rinse the parts in warm tap water to remove the soap residue.
Some types of medications can easily remain on the mesh, therefore pay
close attention during washing.
Do not touch the mesh with a cotton swab, or with a pin.
clean, lint free (paper) towel.
7. Clean the main unit and it's electrodes by wiping it off with a (moistened) gauze.
Use a dry gauze to wipe the main unit dry.
Do not use volatile agents, such as benzene or thinner.
8. Assemble the unit, refer to page 10.
9. Store the unit in a dry, clean place.
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