Hello! I’m not sure what is going on with this penny but it appears the surface was not level when it was struck and the image left by the die appears to have been off a bit due to a raised spot on the coin. And the center of the image appears severely worn off from the area being raised higher that the edges. I don’t know what an error like that would be called so any info would be great!
Yes, I cleaned! It had a thick, green candy-like substance on it. I’m always curious to see what is hiding under gunked up coins.
Improper cleaning of coins will severely reduce the numismatic value of a coin. If you think your coin has any value above face/melt, don't clean it! Luckily you probably didn't hurt the value too much on this coin as it probably didn't have much value to begin with. I myself have made the mistake of harshly cleaning coins which had numismatic value, something I now regret.
Both sides are harshly cleaned, at a minimum. Not an error - what you see is the result of the scrubbing. There might have been some light die clashing, which is very common, but with those surfaces, the coin is worth face value only.