Many fluxes are water soluble, but some require alcohol. Older rosin flux required alcohol, but it isn't used much anymore that I know of. I assume you used lead free solder.
Acid #5 work very well
I recently had a new HVAC put in my house and had them leave me the 3/4" copper tubing going to the old outside unit. Looks like there is oil on the inside. would this Acid#5 work for that? Was thinking about making a wort chiller with this.