Countryman E6, Manual

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This procedure is rarely necessary, but it may help if frequency response and
directionality have deteriorated because the tiny grooves on the element are
contaminated with dust or makeup.
Make sure your hands, the work area, the EarSet’s boom and end cap are clean.
Take a 6” - 8” piece of clean gaffer tape and form it into a circle, sticky side out.
Stick it down on the top of a table, near the edge. Do not use tapes that may leave
adhesive on the mic.
Remove the cable and end cap. Hold the EarSet by its boom, about an inch from
the bare mic element. Lay the element down on the adhesive, with the earpiece
hanging off the edge of the table. Gently roll the mic a full 360° along the adhesive
to remove dust or debris. Replace the end cap and cable.
Emergency Back Port Cleaning Procedure