How long does the solution last after dissolving the cubes?

I received this question in an email today, and thought I would post my response here just in case anyone is wondering. :)

The Grapefruit Seed Extract (GSE) that is added to most of my blends is a very gentle natural preservative. GSE has anti-microbial/anti-yeast/anti-fungal properties to help keep your wipes water cleaner for longer.
I would recommend keeping a spritz bottle of solution near your changing station - keeping it in a spritz bottle will keep it fresher for a lot longer than dumping it directly on cloth wipes (especially if you use a wipes warmer).
I've kept a bottle inside DD's diaper bag and it has lasted us a couple months and hasn't gone bad yet! It still smells fresh, and has no gunk floating inside the bottle at all!
We also keep a tupperware container full of cloth wipes that I pour the solution over. The longest I've ever let them sit like that is about 2 weeks (I forgot about them inside DD's diaper bag) and they smelled fresh when I opened the container after 2 weeks.
Usually we keep enough pre-wet cloth wipes to last 3 days, and then we wash all of our cloth wipes along with our cloth diapers.

In conclusion; It is my belief that the solution will stay cleaner longer when it is stored in a spritz bottle. Let me elaborate; hands and random particles from the air will be going into the wipes container throughout the day. However, the solution inside the spritz bottle will not be coming in contact with bacteria or germs that may potentially be lurking on your hands or the cloth wipe fabric.
I hope this helps answer the question, for anyone who was curious :)