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Why does the tubing in my earmold harden?

April 26, 2017earmold harden tubing

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Why does the tubing in my earmold harden?

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Most all soft plastics harden over time. Earmold tubing is no different than any soft PVC-like material. UV light along with body chemistry acts together to cause the tubing to harden. Believe it or not, hard tubing has an effect on the sound quality of the hearing instrument. Stiff objects carry frequency differently than soft objects. When the tubing on the mold hardens it should be replaced. Your hearing health care professional can do this for you.