Hello all. I am a proud 2 day old owner of a 2012 Touring Elite (former Sienna owner) and I fear my children are going to quickly make the center armrest (the back of the middle seat when folded down) a sticky mess -- spilled drinks, etc. does anyone make some sort of a cover/liner for the arm rest/cup holder? Or has anyone figured out a do-it-yourself solution? thanks much.