Re: brake fluid change

Hello,
I have been watching this subject with interest since many years ago, I
was instructed and advised not to use any solvents in master cylinders
or wheel cylinders because they are porous and therefore would absorb
and retain the solvent(s) to some degree.

I guess my question is obvious. Could someone with some experience
explain whether this correct or incorrect?

Thanks,
Jay Fishbein
Somewhere between the Atlantic & Pacific Oceans