Does the area stay damp? If there is a lot of debris, I would clean it up and apply the Sluggo. Snails and slugs typically seek out the more moist and cool areas here and those are the areas that I tend to treat. I also constantly find slugs making their homes near or in the drainage holes of my pots as well as the depressions about the bottom of my pots so if you have a lot of potted plants, you may want to take a peek there, too.
You can also try lightly cultivating the surface of the soil if you have the time or inclination. Last spring, I found snail eggs (pockets of 50 or more round, clear to white,1/8"+ eggs) in 2 pots when re-potting everyone. A snail must have been busy this summer, though, as I noticed an uptick in baby snails mid-summer among the potted daylilies. The cluster of eggs were close to 2" in diameter and perhaps 1/2-1" from the surface of the soil.
