Always interested in the 'expert ' opinion, but as I said and this is based on a great deal of trial and error, including clearing the mess left by others.
Personally, I have never used white spirit, but thought I thought I'd explained myself with reasonable clarity.
What I neglected to say, was that the gum removal is done, after cleaning, so there has been some imbibing of moisture, by the gum.
I certainly stated that my way of removing gum, resulted in some of it breaking into tiny pieces, which were vacuumed up with a suitable machine.
The use of an impregnated cloth is to wipe away any surplus
This is the quickest method , by far, of removing gum that I've experienced, including the steam wand, which doesn't get close enough to the wad, to release it quickly and completely
But then...............it's only my opinion.
take care
rob m