Best practices - cleaning contacts!

NO.. You want the little bottle of 100%https://www.amazon.com/DeoxIT-G100L-Brush-Applicator-7-4mL/dp/B01FFV8MEO/ref=sr_1_4?keywords=caig+go...This bottle will last you ten years.. (if you do not spill it)I am still using the last of a bottle I bought at least twelve years ago...Only the 100% will last like that. it does not evaporate or go bad.The red, which is stronger cleaning power.. more for unplated copper, silver.Is: https://www.amazon.com/CAIG-Laboratories-D100L-2DB-Electric-Cleaner/dp/B0002BBVN2/ref=pd_day0_hl_469...Usually after I clean with the red, I apply the Gold. (and wipe it mostly off. as mentioned. You do NOT need the Red unless you want to clean bare copper or bare silver. The Gold is all you need for Gold or Rhodium plated connectors.
I wipe it off with a paper towel. But I use Viva Paper towels, which really are way more like cotton than like paper. Only the full sheet type rolls, not pattern, nor color design! not half sheets... All those have been altered from the original. Only the full sheet plain is still really good.I polish CDs with Viva, I wax my car with Viva. (try polishing a CD with any other paper towel Yikes no way.)For tight spaces yeah a Q-Tip (like inside a male chassis mount IEC. or the inside of a Male RCA. I never try to do the inside of the female RCA.. But other folks use Dentist Root Canal bits The ’Black, and the ’Red are the best sizes. I have never tried to buy them. Other folks claim they work well for female RCA and tube sockets.I was just reading about them today, but I lost the spot I saw it. Found it link to A.A. post https://www.audioasylum.com/audio/general/messages/74/743531.html

Thanks, everyone!  Super helpful.

Love the dental bits.  So smart. 

For cleaning off banana plugs, though, would these wipes be a good choice?

https://caig.com/product/deoxit-gold-k-g1w-25/
I'll get myself some VIVA paper towels and get started! 

Just two other questions:
Should I expect brightness in my system for a few hours or days after I do this?
You polish cds, Elizabeth?  What is that about???
Many thanks!!!
Margot

It probably goes without saying all contacts in the house should be cleaned and/or conditionied once in a while, i.e., all wall outlets and plugs for fridge, TVs, computer, lamps, air purifier, what have you. All circuits feed into the audio circuit.

It really depends on the material that your contacts are made of.

If your contacts are gold plated, than cleaning is very simple because gold is not reactive and does not oxidize or corrode. The major contaminant that coats a gold surface are hydrocarbons, although there may be some salts that are on the surface from hand contact. None of these are chemically bonded and are easily removed with any alcohol; methanol, ethanol, or isopropyl. More aggressive cleaners are not needed for gold plated contacts. 

If your contacts are copper, silver, brass or another metal than a more aggressive cleaner like Deoxit can be used.