I just put SD single coils in my Tele - love the sound.
My question is: is there anything I have to worry about in terms of PU maintenance? Will contact with other magnets demagnetize them or degrade the tone?
I always wanted to know if rusted pole pieces did something to the tone and how to clean them...
Everything does something to the tone. Still, I don't know. Me personally, without doing the research as how to properly clean Alnico material or whatever, I'd grab a wire brush (or stiff plastic brush preferably) and WD-40.
WD-40 is good on rust. An old stiff tooth brush may be good also.
I would avoid a metal bristled brush because, any metal that comes off of it will be impossible to 100% get off the pickups.
i like to dip mine in love pudding.