The Widex Nanocare Wax Guards are used to protect the hearing aids from wax. Changing the wax guard is an essential part of hearing aid maintenance and keeps it performing at its best. At Blackberry Hearing we sell 4 packs of 8 Widex Wax Guards for €20. We recommend changing the guard or filter approximately once per week although this can vary per customer.
How to change the filter is described in our YouTube video here;