Dried lavender wrapped in a napkin might work. or any dried fragrant flower for that matter.

I make ghetto incence. Take rolling papers and roll a j with nothing but lavender. I let that burn in the ashtray whilst i smoke, fills the room with nice smells.

Or in a small pan put some water, orange peels, lavender,cloves. Put the heat on medhigh, then low simmer. in 10 min your whole house will smell SO nice.