With the aid of a microscope and a bright light to see inside the ear, Sheryl uses suction to clear excess wax and clean the ear canal.
"It is gentler then the old syringing method and it is quick and efficient as well.
"My appointments are 15 minutes long, and that is plenty for most people although sometimes there is a lot of wax build-up and I might have to give them a bit longer."
Patients are referred by general practitioners and specialists, who may need to have a patient's ear cleaned before they can accurately assess a patient's hearing problem.
Some people attend the clinic often because they experience regular wax build-up, which Sheryl says can be attributed to a range of causes.
"There are those who have a predisposition due to their genetic inheritance and hearing aids cause more build-up.
"The majority of my clients are older people, although I get a very wide range - my youngest was a 4-month-old baby and I have treated people who are over 100."
As a registered nurse working in retirement homes in 2003, Sheryl said she became interested when she attended an education workshop with the local hearing therapist.
"She said they needed someone to train and work in the area and I decided that could be me."
The equipment is portable and the table that patients lie on can be folded and transported so Sheryl is also able to run clinics in other centres.
The service covers Taihape, Feilding, Marton, Levin, Otaki and Paraparaumu, and Sheryl used to cover all those areas herself.
Sheryl is still enjoying her work after more than 10 years in the job and said she still finds it very satisfying.
"People are so relieved when they can hear properly after a treatment - we need to hear in stereo and if one ear is blocked, it affects our sense of direction."