What’s your vote for the most ridiculous, overpriced, and useless tweak?

My vote: Furutech Outlet Cover 105 NCF $220, with “special crystalline material that has two “active” properties.” https://www.thecableco.com/outlet-cover-105-ncf.html

I’m a little surprised none of the tweakaphobes has mentioned the Quantum Clip. The Re-animator. Hey, If this is going to be a remedial class for advanced tweaks so be it! And the Clever Little Clock chopped liver, I suppose?

Nobody can understand what he cannot at first, or be it at last, imagine as a possibility... Alas! An answer for a question we never ask for, seems to some of us like an insult...But why not trying,experimenting and going for the unexpected ? Tweaks are only fun and rewarding if you make them for yourself... It is not necessary to buy anything, only to create for yourself...
A cheap tweak.  Installing red light bulbs in your listing room improves the sound.  Ha.
That reminds me. I’ve got a million (count em!) candle power adjustable strobe light I use to improve CDs. Haven’t used it in years. It’s a makeshift “photon cannon” in the style of Nespa Pro strobe light CD device. Just set the thing for 100 flashes per minute and expose the CD to the strobe light for 60 seconds. It will treat about 8 CDs simultaneously. Cannot beat with stick!
" You ever try and ask your power company to correct the direction of the wires connecting your house to the local transformer?"

Yes, the restraining order is still in effect I believe....