Are contact treatments worth the money?

f audio (or electrical) connections did indeed provide optimal transmission: contact enhancers could not further affect one's music reproduction, but to degrade it, or have no effect on it at all

Yes, yes, but the connections are mechanical & flimsy. (Silver) "Conductive grease", which is non-fancy name for the stuff, is used for moving mechanical contacts... it helps with electrical & thermal conductivity.
OTOH, there is a risk of metal migration (silver into the gold plating of the contacts).
See fo example products like this.
I use such a product, cleaning it every 3-4 months (with acetone -- take care not to touch ANY plastic with acetone) & reapplying.
No doubt Walker's products has its unique merits except one: the price. The industrial equivalent, while not cheap, is far more reasonably priced.
Regards

Bicycle_man, no retailer or manufacturer has chimed into this thread. Only various of us who use the products in question.
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I am very sorry, Rushton. I mistook your post as a plug and did not read it carefully enough. Please accept my apologies.

I agree to disagree. This is another audiophile topic that can go on endlessly in debate. I have stated my thoughts about it, and those who disagree with me have stated theirs. There it is.

I reiterate that I am glad that some companies offer money back guarantees on their tweeks. That, to me is important. That promotes experimentation, which is a critical aspect of improving one's system.
Cheers!

No harm, Bicycle_man. We can certainly agree to disagree for there is much room in this hobby to differ. I agree that experimentation is important as we seek to improve the enjoyment we get from our respective systems. Sharing actual experiences is one of the great values of the Audiogon forums.

Best wishes,

Use Deoxit process. Couldn't discern any audible difference over the few weeks following. But it did make sense to clean and protect the Cu connection at my spade. That was sense enough to me.