+1 on the hot soapy water. The water removes the potassium chloride from the spent primer (salt, the corrosive part), the soap cleans some of the spent powder residue, and the hot makes it dry faster.
The Windex thing came up when guys wanted something for use at the range, for a quick clean and oil before packing up for home. Ammonia doesn't "neutralize" anything, the potassium salt left by shooting ammo primed with corrosive primers is the product of the neutralization of an acid and a base, it can't be neutralized, only dissolved. Ammonia DOES act like a soap, makes water wetter to dissolve and clean better. You could use soapy water as well. Just make sure the bore is dry and oiled after.
Hoppe's works not so much in neutralizing but in cleaning. Clean the corrosive crap out of the bore, it doesn't matter how, dry the bore if wet, and oil. Done deal.