If your hearing aids use Cerustop wax filters then this is the guide for you. 
Step one: Remove the dome on the hearing aid - the flexible silicone ear piece that sits in the ear. 
You can try removing it by holding the speaker between to fingers and pulling the dome off using the other hand as shown below - this can be difficult however it is supposed to come off. 
The wax filter is highlighted green below - you can identify the wax filter as a small, white, circular bit with a hole in the middle at the very end of the speaker. 
Step two: Remove a Cerustop wax filter stick from the grey case. 
One end of the stick has a new wax filter which can be indentified by the small, white plastic bit at the tip. 
The other end is a tool for removing the old wax filter from the hearing aid as shown below - indentifiable by its thinner, non-circular shape and having a small, black bit on the tip. Push this end into the the hole in the wax filter at the end of the speaker - then carefully pull the stick back out. 
You should find that the removal tool has brought the old wax filter with it and it is no longer attached to the speaker. 
Step three: Now that the old filter has been removed, flip the Cerustop wax filter stick around so the new wax filter is facing the speaker. 
Push this end of the stick with the wax filter into the hole in the speaker where the old wax filter was - then carefully pull the stick back out. 
You should find that the new filter is no longer attached to the end of the stick and is now attached to the speaker. 
Step four: Attach the dome removed earlier on your hearing aid again and you are good to go. 
If the dome is dirty, broken or brittle we recommend you use a fresh dome instead. 
It is a good idea to perform regular maintainence on your hearing aids including replacing the wax filters, domes and cleaning them to ensure you get the best performance and prolong their lifespan. 
A wax filter should be changed once per month or when you notice a reduction in volume or sound quality. The job of the wax filter is to protect the speaker delivering the sound to your ears from debris that could cause damage - when the wax filter has too much debris built up it can block the speaker, affecting the sound that passes through. 
Cerustop Wax Filters can be purchased on our online store here or over the phone on 01242 262551 for just £7. 
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