Resin Printing: cleaning your IPA

I recently got my hands on a Prusa SL1 resin printer, and I am in the process of getting acquainted, and that will be the focus of a separate post. In the meantime, during the pandemic, people seem to be buying Isopropyl alcohol (IPA) by the gallon and raising prices so it can be quite tricky to get hold of some for resin print cleanup. Yeah, there are some good reports with other liquids, but IPA is widely recommended, and so I think it's probably a good idea to see how much mileage I can get out of that. The way it works is after print you have to wash your parts in IPA to get off all of the uncured resin so you can properly cure the parts without shiny spots or wash lines. Even if you leave the new prints in the printer for a few hours, the resin on the prints still needs washing off - it's quite viscous so sticks to everything.