I go with these guys...
KMC Chain Industrial Co., LtdAfter years of every method known to man, I've gone with what is referred
to on CC as the 'Mickle-Method'.
Firstly using a baby wipe remove the external crud (well they work welland we have zillions of them around the house).
Then the Mickle method...
Apply lube, spin the drive-train, wipe off with a cloth, repeat.
No solvents, no more taking the chain off, white spirit, heating in vaseline/grease, drying in ovens blah, blah, just lube & wipe, lube and wipe. Leave the original grease in the pins where it's supposed to be.
I might be wrong, but I don't buy into the 'grinding paste' deal.