Once the areas you want to clean are wet, scoop up debris and dump it in a plastic bag for disposal outdoors. Be systematic and thorough. Mice are curious creatures. If you discover they've been foraging in your kitchen, don't just clean areas where you see evidence they've been snacking. They've probably been on your countertops and in your cabinets. Clean any areas where you think they've been active. Look under your appliances and furnishings and behind them, too. Double bag mouse trash, one bag inside the other, and tie them both tightly. Place bags outdoors for pickup as soon after cleaning as possible.