We use Extreme (aka: Aviation) Simple Green, regular old fashion, plain, original-formula simple green makes aluminum brittle over time. If that doesn't do it, even after a little soak, try some odorless (still smells like solvent, just means they've removed most the sulfer) mineral spirits (it's what we use to degrease engines, not the most friendly to paint).
AvGas leaves residue and is almost as bad as turpentine to the skin, esp if you're sensitive to such things.
Mineral spirits are based on a pure form of petroleum, and their evaporation rate is fairly moderate, but they also release harmful vapors. The only difference is that these vapors are not absorbed through the skin like in the case of turpentine. And the best part is that these spirits are more affordable than turpentine. Mineral-spirits are considered to be stronger solvent solutions as compared to the odorless mineral spirits, or white spirits.
PS - I feel you gotta dilute the hell outa the extreme simple green to lessen its streaking, or just got over it again with a wringed-out wet towel.
