Widex AK-CIC - Manual (Page 31)

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The relief vent, full length
The relief vent permits aeration of the ear canal. If
your hearing aid has a full length vent, the vent
goes all the way through the hearing aid, from one
end to the other. If wax has accumulated in and/or
around the relief vent opening, it must be removed.
Use the long wax removing tool (tool 2).
Clean any wax from
the vent by passing
the wax removing
tool all the way
through the vent. It
is important for the
performance of the hearing aid that the relief vent
is never blocked. Make it a habit to clean the relief
vent every day! In rare cases so much earwax can
accumulate in the relief vent that the sound of the
hearing aid changes. In that case you should see
your hearing care professional.