[pianotech] Piano Dusters

[Albert Picknell]

Hello List

I'm wondering what kinds of experiences some of you may have had with various kinds of dusters for pianos.  Have feathers, wool, cotton, or high-tech microfibers worked well or poorly for you?  Or how about something like this, which has fine cotton fibers treated with paraffin?:

http://www.californiacardusters.com/premiumcarduster.html

Thanks in advance,
Bert