Depending on the components different set ups have different mixture limits.
On aquamist you are limited to 50% methanol (methyl alcohol). Ethanol and isopropyl alcohol limits are too low to even consider using them. The seals will swell if you use the wrong ingredients or too much of an ingredient.
Many different setups run very well on 50/50 methanol/water. Heet in the yellow (not the red) bottles is a good source of methanol in the US.
Some use winterized windshield fluid in different kits - though I am aware of no adverse effects from the small amount of detergent - I have seen no pump/kit manufacturer explicitly recommend it.
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