Hi, I am new to the site, and I have a problem... I am Mom to 3 adopted cats, all much loved!! No, that is NOT the problem, hehehe My neighbors have decided to grow a "weed" garden next door and I have gnats wanting to come inside (through the screens, mind you!) and invade the litter boxes. Aside from changing the litter each time one of them uses the boxes, does anyone have any ideas for a safe spray or some kind of deterrant? We are having a terrible problem with insects this year due to the mild winter, but I don't want this problem to get out of hand. Gnats always make me feel neglectful and "un-clean", which is not the case. Any help would be appreciated.