No, I don't think I have have dirty electricity. It sounds nice and clean to me. No clicks or pops.
But I still want to do this.
The fact that lots of people whose views I respect have got good or excellent results from doing it - so much so that they are happy to openly recommend giving it a try - makes it seem a lot less likely to be pointles.
The sound of my current system does get even cleaner and as the evenings get later and later (I am occasionally sober after 8pm) - which is a very rough measure of how much external EM noise is dragging my SQ down.
I do have a lava lamp, PV panels data relay box, and various nasty STBs, extension leads, a router and other e-junk plugged in in my listening/sitting/telly room - plus of course a house full of normal electronics on the same main ring.