No bass after cleaning

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Hi OP, did you fix the problem? I am having the same issue right now.

Ich hatte das gleiche Problem und die gleiche Ursache, letztendlich konnte ich es lösen indem ich das kleine Loch nahe des Silikonaufsatzes (in meinem Fall mit Heißkleber) verschlossen habe.

Ich weiß klingt komisch aber jetzt ist der Bass wieder wie er war und das Mikrofon funktioniert noch immer gut.

Hi, quick update to the matter,

I closed the small vents side of the main nozzle with some glue. Dont use super glue, use glue that usually is used with sticking papers together (ex: fevi stick), let it sit for a day, then your problems will be solved, though I did sell my air pro 3's months ago, but used this method to fix beforehand.

So as far as I've understood, there might be a thin layer of foam inside the vents which gets torn apart after cleaning aggressively, which results in the bass being non-existent. Use the above method to fix your issues.