1874 Three Cent Nickel

I dont see it being cleaned but I do not know the series well. It does have a spec of green that was under some fuzz in the flip.

here is the tiny green spot under the fuzz. Fuzz is the white spot in the holder by the green area.
I was thinking of putting in acetone in case its not a corrosion spot. its a very small spot but id like it gone.
if it is a small corrosion spot and ideas, olive oil and a tootppick? I live in Idaho so not worried about humidity.

As to acetone vs. xylene? I wrote this up not long ago:

http://goccf.com/t/398235&whichpage=2#3412791

Not much difference between them - however xylene is much more detrimental to your health.

From the linked article the key saftey points for both are...

ACETONE:
In small amounts, the acetone is not very harmful but it does produce vapors that can irritate the mucous membranes of the eyes and the cells of the skin. It is also a flammable chemical and so people should be careful to not use too much in an enclosed space or near an ignition source.

XYLENE:
Xylene is a potentially dangerous chemical since it is flammable and has been shown to cause irritation of the mucous membranes and skin. It has also been shown to be toxic to the body if inhaled and thus individuals working with xylene should take precautions to avoid contact with skin or with breathing in the fumes. Xylene can be harmful to the nervous system and cause damage to organs like the lungs, kidneys, and liver.