Hosa D5S-6 CAIG DeoxIT 5% Spray Contact Cleaner, 5 oz.

I've used one form or another of this product since the mid '70s and it's fantastic.I'd found out about it from a magazine back then called Audio Amateur and at that time, the similar product was called Cramolin. As with DeoxIT, it came in a red and a blue variety. The blue is/was a preservative for newly manufactured contacts and the red is/was a cleaner and preservative. Theoretically, the blue may provide longer/better protection while the red is better for cleaning and restoring contacts which are already oxidized.You can clean contacts with the red, then remove it, then treat with the blue to get the best protection of already oxidized contacts, but in practice, the red alone works so well that it's extremely effective to simply clean and treat the contacts in one step using only the red. As a result, I use about one can of blue for every ten or more cans of the red. For most uses, most folks only need the red (D) variety. I don't want that to make it sound like I go through cans and cans of the stuff, but since I work in the electronics field, I do use a lot more than most people.As has been mentioned in several other reviews, you need very little of it to do most jobs. A single can will last a very long time even for someone who is constantly working on a lot of equipment.After finding out how well it worked on audio connections and potentiometers, I introduced the folks at the electronics company where I worked to it. All of the technicians and engineers were amazed and it soon became a staple. We designed, manufactured, installed, and serviced various telemetry and process control equipment. A lot of this gear as well as equipment made by others that we were called upon to service was in areas with corrosive atmospheres like oilfield, refinery, water/wastewater treatment, laboratory, and other locations where hydrogen sulfide, chlorine, hydrochloric acid fumes, etc., are present, leading to lots of contact-related problems.It's been extremely effective over these many years, and although the name and formula has changed since the "Cramolin" days, the new stuff seems to still be very good.I've also used it on very high voltage connectors and one of the amazing properties of it is that while it improves contact integrity and lowers contact resistance dramatically, it does not break down and cause leakage or flashover when used on high voltage systems. I've used it for years on photomultiplier tube and Geiger tube devices (radiation survey and monitoring equipment), and never had any problems with it. These systems usually operate with bias voltages between 900 and 1500 Volts, but sometimes run up to 2500V.A fantastic example of how it works was something we did many years ago where we had a batch of very old thermal self-resetting circuit breaker devices in a system. The problem was that they had silver contacts. Silver itself is the best conductor of all elements, but it is very reactive and oxidizes (tarnishes) very easily. These devices were sealed and "non-repairable". But their contact resistance was unacceptably high.I mixed a solution of Cramolin Red and a solvent (probably Freon TF back in those days), put it in a glass jar, and simply dropped these breakers into it and kept them submerged until the bubbles stopped coming out to make sure they were totally flooded with the solution. We then took them out, letting the fluid run back out of them, and then rapped them on a desk a dozen times or so to make the contacts inside "jiggle" a bit. That was enough to let the Cramolin work its way between the closed contacts.Measuring a number of these breakers before and after the treatment, the resistances started out between 100 and 200 milliohms. After treating them, the typical resistance went down to around 6 milliohms! The high current and low voltage these devices needed to carry meant that the voltage drops across them had been unacceptably high, but post-treatment, they operated beautifully. And stayed that way for years.Various other contacts which would heat up and cause other problems prior to treatment operated cool and with extremely low voltage drops after treatment.I've personally "repaired" countless potentiometers, switches, and various connectors over the years with this stuff.We call it "Technician in a Can", and it lives up to that name. I pre-treat a LOT of contacts prior to crimping them onto their wires, and it lowers the mating forces and improves the reliability of virtually any connector.It truly is special stuff. It's indispensable for technicians, manufacturers, audiophiles, etc. If I had a 55 gallon drum of it, I could take entire pre-amps and other audio gear and dunk it to fix all of the bad switch contacts and pots in one quick operation. :)The only thing that's a minor issue is that as with any contact cleaner that has (or is nothing but) a solvent, it will flush away the viscous goo that's often used to make a potentiometer have a "silky" feel to it when rotating. So when you're treating a pot, it's best to try not to allow any to get to the shaft/bushing part of the pot if you want to preserve the grease that's in that annulus.But it often totally fixes a "scratchy" pot by simply getting it on the resistive pad and then running the pot back and forth a dozen times or so.As with so many things, for some reason, manufacturers just love to make pot wipers with silver plating. Bad idea! But all too common. Once that wiper tarnishes, the pot will sound awful since silver oxide is an insulator. The DeoxIT usually allows that oxide layer to be removed by simply rotating the pot a dozen times or so, and then it coats the wiper and the resistive element, preventing future problems and leaving the pot working/sounding excellent.Anyhow, all I can say is that this product has served me extremely well for nearly 40 years, and I highly recommend it.

The Hosa D5S-6 CAIG DeoxIT 5% Spray is a game-changer for cleaning electrical contacts! It effectively removes oxidation, improves conductivity, and prevents future corrosion. The spray nozzle ensures precise application, and the 5 oz. size offers great value. Works perfectly on audio gear, guitar pedals, and more. Fast-drying, non-residue, and reliable—this is a must-have for any technician or musician. Highly recommended for restoring and maintaining electronics!

RECOMMEND: Absolutely!PROs:• It works!CONs:• More expensive than other products that advertise the same function.BACKGROUND:When my neighbor tossed out a Peavey Vypyr VIP-2, I asked if I could take it off their hands. They agreed, and I brought it home—only to find that three of the digital knobs weren’t responding at all. I asked ChatGPT what to do, and it suggested DeoxIT D5. I was skeptical (especially after seeing the price on Amazon), and even tried arguing with Chat—but it wouldn’t back down. “DeoxIT is the only way,” it said.Reluctantly, I ordered a bottle.A few days later, it arrived. I tore down the amp (not fun), applied the spray to the problem pots, let it dry, reassembled the amp—and BAM! It worked perfectly. Like new. I was stunned.I didn’t stop there. I’d noticed scratchiness in my guitar’s volume and tone knobs, so I gave DeoxIT another mission. Removed the pots, sprayed, reinstalled—same result. Smooth, clean operation.DeoxIT D5 isn’t cheap, but it’s worth every penny. This little bottle of black magic brought my gear back to life. I can’t recommend it enough.

I’ve been using this spray contact cleaner for a few weeks now, and it’s become an essential part of my toolkit! Whether it’s for cleaning electrical connections, circuit boards, or small electronic devices, this product does an excellent job without causing any damage.The spray nozzle is easy to control, and it delivers a precise stream that helps target specific areas. It quickly dissolves dirt, grime, and oxidation from metal contacts, and I’ve noticed that my devices are working more smoothly after cleaning. No residue or sticky buildup left behind—just clean, dry contacts that improve performance.

I recently purchased the Hosa D5S-6 CAIG DeoxIT 5% Spray Contact Cleaner, and I must say, it delivers exceptional results. This product is highly effective at cleaning and rejuvenating electrical contacts, making it a must-have for anyone serious about maintaining their electronic equipment.The 5% spray formulation works wonders on scratchy potentiometers, intermittent connectors, and oxidized contacts. After using it on my vintage audio gear, I noticed a significant improvement in performance and sound quality. The spray is easy to apply and doesn’t leave any residue, which is a huge plus.However, the one downside is the price. At 5 ounces, the can is relatively small, and considering the cost, it does seem a bit expensive compared to other contact cleaners on the market. That said, the performance and quality of the product do justify the higher price to some extent.If you’re willing to invest a bit more for top-tier maintenance of your electronics, the Hosa D5S-6 CAIG DeoxIT 5% Spray Contact Cleaner is definitely worth it. Just be prepared for the higher cost. Overall, it’s a fantastic product that delivers on its promises.

Good stuff. Removed power and cleaned the volume control on my old hi-fi system. Volume didn't crackle. It just had dead spots. It Works Great NOW !!! Product has no bad odor. It's like a very light oil but not messy at all.