Copper contact cleaner - Lemon Juice

[badmix]

Watching Power Block, they dumped some parts in a Lemon juice solution and sure as sh!t cleaned them up nice. Just thought id share.

 

[Carcinogen]

Vinegar works pretty good too.

http://www.instructables.com/id/How-to-perfectly-clean-wires-in-minutes/

 

[dyeager535]

As does spaghetti sauce/tomato anything.

Or fine sandpaper/small metal brush.

 

[diesel4me]

You can boil carbs in lemon juice or vinegar (or a combo of both) to clean out all the crap left behind by ethanol ,which most petroleum based carb cleaners wont touch too...I've saved a few really raunchy looking small engine carbs with the lemon/ vinegar boiling trick..

I also put vinegar in a very rusted master cylinder that sat empty a long time and let it sit a few days--when I used a shop vac to suck it out,the insides were nice and clean,gray like sandblasted metal...

I did however,end up replacing the master due to the seals being ruined when I had tried forcing it to move, before the vinegar treatment...the vinegar may have softened the seals a bit,which isn't really a bad thing,because they had become hard and brittle from sitting..

 

[Smokinthehippies]

Yeup. The point is the acid to eat off the top layer of copper.

When we owned the plating shop we used some citric acid for a lot of delicate parts. It's strong enough to clean but not so strong to eat the part to nothing.