VWR 97043-930 Instruction Manual page 11

Optimizing Your Cleaner
Solvents - never use solvents. Vapors of flammable solutions will collect under the
cleaner, where ignition is possible from electrical components.
Renewal - replace cleaning solutions often to increase ultrasonic cleaning activity.
Solutions, as with most chemicals, become spent over time. Solutions can become
contaminated with suspended contaminate particles which coat the tank bottom,
inhibiting ultrasonic activity.
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