Hearing aid domes are silicone or plastic tips that attach to the receiver wire and seat inside the ear canal. They direct amplified sound and secure the hearing aid in place. When a dome repeatedly slips out, it compromises sound quality, causes whistling feedback, and creates frustration. Slippage usually relates to the physical fit, the insertion process, or environmental factors like moisture or earwax.
Mastering the Correct Insertion Technique
Improper technique often causes domes to fail to seat correctly and migrate out of the ear. Since the ear canal is not a straight tube, proper alignment is necessary for a secure fit. Before insertion, gently pull the earlobe downwards and slightly back with your opposite hand. This action momentarily straightens the natural curve of the ear canal, allowing the dome to pass the initial bend more easily.
Guide the dome into the canal until the thin receiver wire rests flush against the outer ear. Many hearing aids feature a flexible plastic retention lock or tail. This retainer must be tucked into the concha bowl of the outer ear. It applies gentle counter-pressure, significantly improving stability and preventing movement during jaw motion or physical activity. A properly seated dome should be comfortably snug.
Evaluating Dome Style and Sizing Options
The physical characteristics of the dome are a major factor in how well it stays in place. Domes come in various styles, including open, closed, and power or double domes, each offering different levels of acoustic seal and retention. Open domes have vents and allow for a more natural sound experience, but their minimal contact offers the least physical grip and may slip out easily. Conversely, closed domes and power domes create a tighter seal and feature more surface area, providing superior friction and retention.
The size of the dome is equally important for long-term security. A dome that is too small lacks the necessary friction to remain seated and will easily work its way out. Conversely, a dome that is too large causes excessive pressure and irritation, prompting the ear to naturally attempt to push the foreign object out.
If you are experiencing persistent slippage after perfecting your insertion technique, the dome size or style you are using is likely incorrect. Consult with your audiologist to experiment with a different size or a style with a better seal. They can recommend the optimal fit based on the shape of your ear canal and your specific hearing loss profile.
Daily Maintenance and Moisture Control
The environment inside the ear canal constantly works against the dome’s retention. Earwax is a primary culprit, as it reduces the necessary friction between the silicone dome and the canal wall. If the dome or the sound port becomes coated in wax, it creates a slick surface that allows the dome to migrate out. Daily cleaning of the dome with a dry cloth or specialized tool is necessary to maintain the dome’s grippy texture.
Moisture from sweat and humidity also compromises the dome’s hold, especially for active users. Perspiration introduces a salty liquid into the canal, which acts as a lubricant and encourages slippage. Users in humid climates or those who exercise frequently should consider using a hearing aid drying kit or an electronic dehumidifier nightly. These devices remove absorbed moisture, keeping the dome and the device’s internal components dry.
If the dome continues to slip despite correct technique, optimal sizing, and thorough maintenance, the length of the receiver wire may be incorrect for your ear anatomy. This structural issue requires professional adjustment by an audiologist.