Is this an interior CLEANER or PROTECTANT? For OTC interior protectants I use Meguiars Natural Shine, it works great. It cleans up your plastics and other "hard" interior surfaces (though mine are never dirty) and leaves a not too glossy shine behind. Im not knocking Turtle Wax, they are now my go-to wax. I love there Liquid Wax, leaves a wonderful glossy finish behind and is SUPER easy to apply and remove.