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.
Dr. Elsey's Cat Attract Problem Cat Training Litter, 40 Lb / 18.14 Kg (Pack May Vary) Great for attracting cats to litter box.