@lonemountain Hi Brad.
Thanks for your clarification on ATC speaker break in.
On similar woofer glue you mentioned. I have had made a mistake using dry microfiber to remove dirt on woofer. Alas, few fabric sticked to woofer and glue, I didn't know the woofer is "wet and sticky". Bad thing happen when I used my finger to remove fabric at the woofer rubber ring, the glue rolled together with fabric as photo attached.
Luckily it does not affect the sound. The woofer no longer look aesthetically nice. I dare not touch the woofer. Any treatment to make good the glue or just leave it ? Thanks