MG Chemicals - 409B-140G 409B Electrosolve Zero Residue Contact Cleaner, 140g (5 oz) Aerosol Can

Sometimes when you use a product like this, it can behard to know for sure if it cured your issue.I had a guitar amp with multiple scratchy pots (potentiometers)I took brain' out and was ready to take some pots out, yetaccidentally observed or noticed that there was a hole in theside of each one lol.... So then I put the little straw on the endof the spray head, and used short spurts in each of the holes,turned each knob rapidly back and forth, FIXED!! 100% ,I also used this on a Fluke Meter (pro model) , the display anda couple of push tabs had stopped responding, after a littlespray where applicable, FIXED !! lol Quite happy, it works,wear surg gloves for sure, and avoid inhaling while using, useoutside or get away quickly after spraying.. I'm sure the ingredientsare 'potent' , yes lets leave it at that. Have a great day, I'll buy thisagain, as/if needed.----------By the way, I've had this for a pretty long timenow and unlike WD40 where the propellent is spent, long before youget down to the 1/4 can level, this propellant and seal system seems tobe excellent.

I picked up the MG Chemicals 409B Electrosolve Zero Residue Contact Cleaner (15.45 fl oz) to clean some old, dusty mining rigs, and it worked wonders. After months of running 24/7, my miners had collected a ton of dust and grime, and this cleaner made them look and perform almost like new.What I really like is that it dries quickly without leaving any residue, so I don’t have to worry about moisture or film causing shorts. It’s safe on plastics and electronics, which is perfect for circuit boards, fans, and power supply connectors. The spray nozzle makes it easy to get into tight spots, blowing away dust and cleaning contacts thoroughly.✅ Pros:Zero residue formula — safe for electronicsCleans dust, dirt, and oxidation from boards and connectorsQuick-drying, no waiting aroundLarge 15.45 fl oz can lasts a long timeWorks great on mining rigs and other electronics❌ Cons:Strong odor while spraying (use in a ventilated area)💡 Tips:Always power down and unplug your miners before cleaning.Use short bursts instead of long sprays to avoid over-saturation.Do this cleaning outside or in a well-ventilated area.Pair with a can of compressed air for best results — blow out dust first, then use the cleaner on contacts.Bottom Line:The MG Chemicals 409B Electrosolve is a powerful and reliable cleaner for electronics. It brought my old miners back to life by safely removing dust and oxidation, and I’ll definitely keep a can on hand for future maintenance.

I have used MG Chemicals contact cleaner for many applications over the years and it works very well. It is available in residue and non-residue formulas. The "residue" is a lubricant that is left behind after the cleaner is sprayed and that is necessary in some applications. The one I purchased is the non-residue formula. I use it mainly for controls and switches when they get dirty. I have the residue formula just in case but I rarely used it. I used to get mine from an electronics store that went out of business after 60 years.(Baynesville Electronics)I am so glad I found it here. Thanks again, Amazon!

This is really good stuff for anyone who likes to work on things that are electronic. Potentiometers create Gunk and debris inside of them and this cleans it out. I use this on a marshall guitar amp, my washing machine, and a few other electronics that I decided to clean just because. Works really well.

The chemical seems to work great, but the delivery straw IS too large (at least on my product). It will not fit inside the nozzle. I have to use straws from by WD-40 or Super Lube cans whenever I want to use the MG product. That is a disappointing experience from a company with such a good reputation.

Have a 50W tube amp (Friedman Runt) and lost bass response on 'dirty' channel. Reached out to Friedman and they suggested liberally cleaning the pots out with this (and only this) product. Was very leery at first but pulled my chassis from the cabinet and blasted the pots at mid pressure via the openings for the lead-outs. It worked like a charm. These Alpha-brand pots are pure tin coated and have an issue with strange symptoms popping up, Dave Friedman knew the fix, shared it, and we are rocking out once more on the over-drive channel!

Does what it says

The tube takes a bit of patience to fit in the nozzle but it does fit. It stays in well. The spray nozzle can be adjusted for low, medium, or high. I used this to clean the tone and the volume knobs on a bass guitar. Sprayed in slowly and did not make a mess or waste product. It's not a large can so it's easy to hold. This is a good value and when I run out if it, I'll buy it again.