DeoxIT on cables/Jacks?

@racked, Not recommended for tube sockets according to manufacturers. You don't want to leave any residue inside the socket. 
Also, when using on tube pins, wipe off all the gunk and make sure pins are dry before using.

I personally find more sonic improvements from cleaning and tightening  very dirty or loose connections than from fancy cables (past a certain point of quality)> This, though, presumes they are dirty. One effective way to clean them is to insert/remove. For connections without a wiping action Deoxit or cramolin is a good idea. CRC also makes very good cleaners and lubricants/oxi barrier products.
So, yes with caveats

I have my own concoction. It leaves a light conductive film after it’s wiped off. Like most conductive liquids at + or - 50 degrees from ambient temperature it reduces micro arching (noise) and INCREASES the actual surface area of contact. Does the sound improve?

Do you like popcorn IN your music or WITH your music..

MAINTENANCE, pays it doesn’t cost.

It’s always better to stay out of trouble, than get out of trouble..

Of course it sounds BETTER. Cables and ALL connection require service at some point in their life cycle.

Worst offenders are jumper bars on speakers and preamp/amp jumpers..

BUT any connection point from the wall to the jumpers between HIGHS and LOWS at the speaker terminals..

Tube sockets.. LOL oh yea make sure they are drippin’ when you flip the on/off switch.. Use good sense.. Dab and dry with cotton balls and air dry with low air pressure.. BTW Ear muffs on while blowing.. Always..

CLEAN & DRY is good with electricity..

Regards

Love DeoxIT, in the mid-eighties I bought these little integrated amps made by Cambridge and then soon after they were copied by Acoustic Research. I had a couple sitting in the basement un-used for probably 10 years and when you put signal to them one channel or the other would cutout. I sprayed all the pots and switches with DeoxIT and everything was silky smooth and not a cutout to be heard. You need to clean everything and I'm of the school of thought that all the little things put together add up to great sound.

If there is a change, it will be positive. So why not?
When you consider the infinitesimal electrical issues that ultimately have an affect sound quality. A clean electrical path seems like it would be something to do regardless.