I'm tired of buying stuff for my Swiffer, so I got a syringe that is for injecting turkeys with spice in order to refill the little jug with 1 part white vinegar and 4 parts water. It is about 95% cheaper and doesnt contribute waste to the landfills.
I finally finished off my last bottle of solution and injected it with the vinegar and water today. It cleaned MUCH better than the solution--didn't leave a film, and got stuff up really well. it aslo doesnt seem to be getting dirty again as fast, because it doesn't have the build-up.
And I got a microfiber cloth to use instead of the disposable ones. I figure I just saved us about $80-100 a year.