Clean the sprayed area well because if cats smell that an area has been sprayed before they will spray there. We use an enzyme cleaner, also cats supposedly dislike the smell of citrus so if you used something citrus scented after cleaning it that might help as well.
posted 11 years ago
Maybe I'll pick up some of that orange oil cleaner, and put a big citronela candle out there. Some of those candles put out quite a smell even when they aren't burning.
I also saw some motion detecting noise makers, that put off a high pitch sound that humans can't hear, but drives cats out of the area. It sounds like they eat threw batteries though, and I don't have an easy way of getting power out there.