Which Deoxit...?

Yes, the Deoxit D5 is the cleaner to use and Deoxit Gold G100L is the preservative to apply afterward...even if the contacts are not gold.

Deoxit D5 would be a better solution for cleaning used connectors. Some people experienced using as such could change a little bit the sound quality after a couple of months. Worse case scenario could happen with  cleaning products like Walker, Cardas, etc. Therefore it is recommended to clean those contacts/plugs with alcohol right after applying Deoxit.

 

 

For cleaning I use MG Chemicals 409B Electrosolve Zero Residue Contact Cleaner.

MG has a UK distribter, as far a I know.

Before the MG I used Kontak (very expensive) and found that the Electrosolve works just as well.

I use D5 for electrical parts and F5 for mechanical parts. For XLR pins I use extra spin-brush dremmel tool. 

Thanks gdnrbob, ivan_nosnibor, michelzay, dekay & czarivey.

How much is Electrosolve? I was also considering Servisol which is about 75% cheaper than DeoxIT. Why the hell is DeoxIT so expensive...?!!