Nicotine reidue on drivers


Is there a safe and effective way to get old nicotine residue
 off speaker drivers? Yamaha NS 1000m, I can see it on the tops of the tweeter and mid-range drivers.
mizike
I forgot to add, vapor deposited Beryllium would never adhere to polypropylene without a surface treatment.
 Well once the Beryllium was wiped off all that was left was a clear see though flexible cone under it.

Cheers George  
George, I was not disputing what you observed. In fact what you observed is what would happen if the Beryllium was vapor deposited onto an untreated or poorly treated polypropylene surface. I was just commenting on the need to introduce reactive bonding sites on the polypropylene surface for the vapor deposited Beryllium to bond with.

What you have to think about is, can it be possible to stiffen a polypropylene cone just with vapor deposited Beryllium partials on it.
To be honest I don't think so, as the Beryillium particles would have no structural strength in either plane at all, unless it's spun or forged as in the GF-1's then there's no need for a polypropylene former under it.

Cheers George  
I have a set of Yamaha NS 1000m speakers. I really like the sound. Once put on stands at the proper height and set up with a bit of rake and toe they are spooky magical. However found the most perfect amp for them. The Bryston B60 integrated amp. I have had some really big expensive amp/speaker systems and this right up there.  Do not laugh that is the perfect power for NS1000 speakers!