Sennheiser ConC 400 Series Instruction Manual page 34

Care and maintenance of the earbuds/charging case
34 | ConC 400
Care and maintenance of the
earbuds/charging case
CAUTION
Liquids can damage the electronics of the product!
Liquids entering the housing of the product can cause a short-circuit
and damage the electronics.
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Keep all liquids far away from the product.
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Do not use any solvents or cleansing agents.
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Only clean the charging case with a soft, dry cloth.
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Clean the earbuds with a slightly damp cloth.
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You can clean the silicone ear adapters and silicone ear fins under
lukewarm running water. Let the ear adapters and ear fins dry at
room temperature for at least 12 hours before re-attaching them
to the earbuds.
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Clean the charging contacts on the earbuds and in the charging
case from time to time using e.g. a cotton swab.
If the earbuds have gotten wet:
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Remove the ear adapters and dry the earbuds and ear adapters
with a dry cloth. If necessary, let the earbuds and ear adapters dry
at room temperature for approx. 12 hours.