ORIGINAL: schnepel
100LL will work, but it's rather expensive these days, over $6 a gallon here.above.
"No Name"brand glass cleaner - 1.99 for 950 ml
Avgas - 1.71 per Liter tax included (At our shop...for the time being anyways...LOL)
Not really that big of a difference.. .but the avgas is still cheaper