I have been using Starter Fluid Spray (diethyl ether) from walmart.
The can is $2, and I can get my chain very clean with just 1/3 a can.
Some tell me it's not oring safe, but it's not in contact very long and works so great..just blasts the dirt off and dries quick.
DO NOT USE AROUND FIRE or KABOOM
...SPEEDING PAST THE LINE OF GOOD TASTE...