Mex, you turned me onto the Caig Deoxit lineup last Fall.
I bought a little kit which came with a bunch of their products in small amounts:
http://www.amazon.com/CAIG-SK-IN30-DeoxIT-Industrial-Survival/dp/B004GE15JG/ref=sr_1_9?ie=UTF8&qid=1...At the time I was having issues with my Engine computer pin/socket connectors. I had gone down to Napa, and bought some CRC QED electronics cleaner and used it to flush out old dielectric grease and debris, and the connectors looked pristine, And i foolishly believed they were.
But the engine computer issues continued. After I bought The Caig kit linked above, I sprayed the connectors with D5, and used their provided swabs to polish the pins and sockets. The Swabs turned black and got all tore up. It was like grey 320 grit sandpaper inside the sockets, and the D100 and the swabs turned it into polished chrome.
The Pins were brass and they went from dull copper colored to oiled gold in color with the same D5 spray/swab treatment.
I was astounded such a 'pristine' connector still had so much oxidation inside of it.
Still my engine computer issues were still present. It was an internal solder failure I later fixed upon acquiring a 140 watt Weller gun.
Anyway, I used the DeOxit gold on these connectors as they are dissimilar metals, and when I next removed them, I found the Deoxit Gold, which has only a small cleaning ability, had dissolved more oxidation on the contacts and left a bluish /green liquid in the plastic connector housing, which I wiped out with some q tips. So time left applied is a factor too.
I've also used the Caig Shield but this is not a cleaner, just a preservative.
Anyhow, After I resoldered the engine computer Pin/ circuit board connection ( no more issues in 7 months since) I went a bit nutty opening up every electrical connector in my Rig, applying the QED to flush the old grease, then DeoXit D5 Spray, waiting a bit, then polishing the pins and sockets with some precision swabs, and they all turned black or dark gray, despite the contacts being immersed in Dielectric grease their whole lives and still appearing to be in good condition on visual inspection after cleaning with the CRC QED cleaner.
The TPS, MAP, and 02 sensor contacts were the worst, ripping swabs to shreds and turning black in the process. Eventually the swabs stop changing color, they just stay pink and do not get shredded.
After this application, my next drive, it felt like I had removed 500 Lbs of weight from the Van and MPG's, which I thought were permanently gone as the result of slightly larger heavier tires, came back.
My theory is the engine computer sends out 5 volts, and after passing through the sensors, the voltage returned allows the computer to vary the spark timing and air fuel ratio, and the oxidized contacts cause more voltage drop than there should have been, throwing out the sensor input signals, and causing it to run richer than it needed to run.
I have to get a smog test this week, so this might prove me correct, if the numbers are better than my 6 previous tests.
Now, I had ordered a larger can of D100, as the sample size in the linked kit above did not last long. This ordered can, the product came out foamy. I contacted Caig about it and they sent me a new can, and this can does not come out foamy, but it also does not have the reddish/pinkish Hue, and it does not seem to clean as well.
I am not sure what is up with it. I need to throw out another Email to Caig. The one which came out foamy worked good, the non foamy non red one does not
That sample kit came with small tubes of d100, gold and Shield, and I've just been using them, instead of the cans of spray, neither of which act the same as the little spray bottle which came in the Kit.
One more thing I can add is physical agitation of the oxidation smothered in D100/D5 is wise. Drug stores, in the dental section, sell these mini bottle brushes, which are awesome at getting inside small Sockets and working the D5/100 around fully as well as abrading the oxidation.
I also found some very small precision swabs which can also fit inside most of the sockets inside the connectors.
http://www.amazon.com/Craft-Cotton-Swab-Round-Small/dp/B0026IBC2Y/ref=pd_sim_21_2?ie=UTF8&refRID=167...The pics show these swabs to have rounded edges, but the ones I recieved were flat on the bottom and perfectly cylindrical. I stocked up on them. these are about 2.5 MM diameter at the tip. Highly recommended.
They have ones with pointy ends and these are good too, but I prefer the linked ones.
My dremel has the chuck adaptor which can clamp down to any size, and I often cut these swabs in half, put them in the dremel, and turn oxidized copper into gleaming oiled gold with minimal effort after application of d5 or d100.
I've noticed my Weller gun sometimes takes forever to heat up and does not get as hot. I remove the tips and find the mating surfaces all black and ugly. I've just used the mini wire brush on the dremel to make them shine again and return lost performance, but have not used the Deoxit on this interface, yet.
Yesterday I used some d100 on the Silicon brass bolts provided with a June 2015 manufacture date Lifeline AGM battery. Turned the swabs dark grey.
Magic electrical juice in my opinion. I use the D100/D5 spray for cleaning, then D/O Gold or Shield for protection/ contact enhancement.
Amazing how much oxidation comes off of Micro USB ports just with the D/O gold. It is also a lubricant. I use it on my outdoor TV antenna every so often when weak stations do not come in, and then they usually return after application. My Wifi adapter also benefits from stronger signals.
Basically I do not open any long unused connector without my DeOxit handy.
