NPS-1260 Connection fluid

I took a chance on this product. After I applied it sparingly to my RCA interconnects, my system went “dark” (higher frequency slightly attenuated, midrange flattened a bit) but something positive was happening with the spatial presentation, the clarity and the reduction of harshness...after a couple days that darkness lifted and the sound was still improved in areas of clarity, dimensionality and overall ease of presentation. I call it like I hear it and though I don’t understand how it’s doing what it’s doing in my system, it’s results are as advertised/promoted.