NOTICE Only use grinding balls > 2 mm to prevent the aeration holes (BD4) in the lid from
being clogged by grinding balls.
10.1.1 Cleaning the Aeration Lid
For thorough cleaning of the aeration lid, it is recommended to unscrew the valves (BD3) from
the valve retainer (BD5).
Unscrew both valves (BD3) from the valve retainers (BD5) using the supplied valve tool
(VW).
The aeration lid can be cleaned with alcohol, petrol or normal household detergent. The
aeration holes (BD4) can be cleaned with compressed air through the valve retainers (BD5).
The aeration lid and the valves are also dishwasher suitable.
The valves (BD3) can also be cleaned in an ultrasonic cleaning-bath. As cleaning agent, water
together with a standard surfactant is recommended. The cleaning in the ultrasonic bath usually
takes two to three minutes. After that the valves are thoroughly rinsed with water and dried. The
cleaning with strong bases or acids is generally not recommended.
Additional information concerning ultrasonic cleaning-baths can be found on the Retsch GmbH
homepage (http://www.retsch.com).
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