What is preferred/best contact cleaner these days?

Thanks, Bob. I appreciate your detailed response and sharing the experience with your friends earlier. I understand completely.

Might be worth a try one day. If equal or better than Q45T or even slightly less effective, many audiophiles would love paying about 1/6 the cost.

Stabilant 22 is the concentrate and the Kit as previously mentioned allows you to do a proper dilution with alcohol and is then referred to as Stabilant 22A.  I use pure Isopropyl (99.9%) from Amazon.  It is a proven contact enhancer used in avionics, NASA, auto industry, etc.  It does have a detergent and lubricating action.

The alcohol evaporates very quickly leaving the Stabilant on your connectors, etc.  I use it on every connection in my system.  Using a very small brush is ideal.  Overapplication is not the intent and will just waste the product.  Nothing is equivalent or performs better.

Michael Dayton Wright invented Stabilant 22 and was famous for his XG10 Electrostatic Loudspeaker and so many other electronics and conventional loudspeakers.  A brilliant fellow that I had the pleasure of knowing for many years. I believe that he held degrees in electrical, mechanical and chemical engineering from MIT.

As a sidebar trivia, he was the first to use black enclosures for his electronics!  His family continues to produce Stabilant 22. There are a number of papers that detail its actions in great detail.

Check-out the Dayton Wright Hommage loudspeaker: 

@perazzi28, Good post.  Thanks for the link, too.

Stabilant 22 and Q45T are the two products I’m interested in.  Plan to try 22 soon. 

In another thread here on AG, I learned that George Merrill of Analog Emporium sells it for perhaps the lowest price in the USA.  So, I’m getting it there since he’s very close by.  Just passing along a pricing tip to anyone else interested.

FWIW, George told me the smaller bottle is enough to do my system many many times over and that once applied it lasts for 20 years.

If I decide to try the Q45T eventually, I wonder if the maker/seller of it would advise I remove the Stabiltant 22.  If anyone knows how to remove Stabilant 22, please share.  I will ask George M, of course.

@dorkwad, how is Q45T removed?

@rc22 

It is easily removed with 90% alcohol.  Q45T

@dorkwad 

Thanks.