I just used the last of the Windex in the bottle which is by far my favorite cleaning product. Before tossing the old bottle and bringing out another I took the sprayer off. We recently got new wood floors installed and use water and winegar to clean them. I wanted a spray bottle of this mixture to use on the little spots so... I transformed the vinegar bottle into a spray cleaner. The best part is that it's already labeled!
What are your frugal cleaning tricks?