How long should the facepiece be submerged during cleaning?

• A. 15 seconds
• B. 30 seconds
• C. 45 seconds
• D. 60 seconds

Answer: (B)

Submerging the facepiece ensures cleaning solution reaches all surfaces and hidden areas, so residues and contaminants are effectively loosened. Thirty seconds provides enough contact time to clean thoroughly without risking damage from longer exposure; it hits the balance between effective cleaning and preserving elastomer materials and seals. Too short a soak may leave residues in crevices, while longer soaks aren’t necessary and could contribute to material degradation or extended drying times. For these reasons, thirty seconds is the best choice.