Hail

I've jut bought a pair of L300. I'm pretty happy with them but they've just got a lillte probleme, the inside mineral wool now falls to dust. I don't know what to use, I don't want to change the sound of those speakers but I would like to install something less aggressive for my breast. So have you got any experience about changing the mineral wool ?

Thanx a lot and sorry for my english, but I'm french.....sorry too