Hello, This my first post here so please bear with me. I have a pair of ADS L810 speakers which I am still very happy owning.These speakers use a sticky coating on both the tweeter and midrange fabric domes. Unfortunately over a period of years this sticky coating has attracted a coating of dust which is very difficult to remove by camel hair brush. I am sure it is adding an unintended amount of damping to these speaker drivers. Can you suggest a SAFE way to remove it or is it even advisable? In addition, I hope this is the suitable forum to ask this question. Thanks very much.