I use an good ole terry towel, soak it in warm water with APC mixed in and attack the seat. Dry with another terry towel, and park it in the sun with all the windows down till dry.
meguiars APC+ at 10:1 then use a steamer with a cloth attatchment on it works the best for me, works great without the APC on headliners.i just use a tiny steamer but i need to upgrade it irritates me sometimes LOL. the APC+ smells like citrus btw, i would call it a mixture of fake/natural orange scent.