You can clean with anything. After years accumulating grime vigorous rubbing with a clean cloth will be an improvement. Alcohol is okay but will only remove what it can dissolve, which is not everything. Xylene (fingernail polish remover, basically), toluene, are better but harsh. Many metal polishes are quite good but will often require a second cleaning with alcohol to remove some of what they leave behind. Flitz is another one. Then there are the zillions of products marketed as contact cleaners and conditioners. In regularly cleaning all my contacts in the whole system over the years I tried way more than I can remember. Basically when it is clean it is clean, and it doesn't matter much how it got that way.
Once clean, that is where the fun begins. Conditioners were until recently all about slowing oxidation without harming conductivity too much. I tried a whole slew of those as well. The one standout in the crowd was Tim's Perfect Path Solutions Total Contact. TC was a game-changer. Far more than a contact conditioner it does way more than just improve conductivity. Now off the market the next one up is NPS1260.
I haven't directly compared and frankly feel no need since TC is so good and I have a stash. But I'm getting some sent my way as payback for some system building help so hopefully able to have something on NPS1260 before too much longer.
Once clean, that is where the fun begins. Conditioners were until recently all about slowing oxidation without harming conductivity too much. I tried a whole slew of those as well. The one standout in the crowd was Tim's Perfect Path Solutions Total Contact. TC was a game-changer. Far more than a contact conditioner it does way more than just improve conductivity. Now off the market the next one up is NPS1260.
I haven't directly compared and frankly feel no need since TC is so good and I have a stash. But I'm getting some sent my way as payback for some system building help so hopefully able to have something on NPS1260 before too much longer.