Ceva Feliway Plug-In Diffuser Refill, 48 mL, 6-Pack Plug in to an outlet in any room for always-on help.
Feliway Behavior Modifier Spray 75 ml Cheapest refills. Count on using them for a few months.
Dr. Elsey's Cat Attract Litter Spray in areas where your cat sleeps and hangs out for boosted help.
Precious Cat Cat Attract Problem Cat Training Litter, 40 pound bag Great for attracting cats to litter box.