Forgot to say that yes, I think you could add citronella to it as well when you put it into the sprayer. Which reminds me of something else.
I've tried to reuse sprayers from old cleaners that have emptied, have purchased some from the store, etc. Tried using them for various items and they just don't work well or last long.
I was looking for something to put oil into that I could spray on roost cracks, etc. (also as a mite deterrant).and I found some (rather pricy) sprayers that don't need aerosol to spray oil. They're designed for using for cooking oils in the kitchen. I purchased a couple of them over a year ago and they work better than any other sprayer I've ever had. They handle the oil really well. But I also started using them for this vinegar cleaner as well because I haven't been able to keep any other sprayer in working order more than a couple of weeks.
So...thought I'd share them here if anyone is interested. I've used the original 2 for the last 1.5 years and I just purchased 2 more I like them so well that I'll use for other things as well.
http://www.usplastic.com/catalog/item.aspx?itemid=84618