Ethanol would be a little "hotter" than isopropyl (more volatile), and I suspect the glycol ether (although you don't state which one) would help in the decrease in surface tension of the mixture. Interestingly, some manufacturers put various glycol ethers in their formulations simply for the purpose of keeping their products from freezing during transport or due to long periods of storage in cold environments. Depending on the chemical, some may also be used to cut grease (as in some detergent cleaners).
Be careful, as some glycol ethers are more toxic than others. Some manufacturers are still putting the following GE's in their products:
Ethylene glycol monomethyl ether (2-methoxyethanol)
Ethylene glycol monomethyl ether acetate (2- methoxyethyl acetate)
Ethylene glycol monoethyl ether (2-ethoxyethanol)
Ethylene glycol monoethyl ether acetate (2-ethoxyethyl acetate)
These also go by the name of Cellosolve and Cellosolve Acetate. These products can affect the blood, and have been determined to be reproductive hazards in chronically exposed individuals.
Gip Winecoff