Whatever you do, DO NOY put Armour All on it. Sure it looks good afterwards, but the first rain you drive in, it gets all over the windows and the wipers do not remove it. Stupid car wash place I had clean my car one time did that. It sucked, big time!
I just use the regular car wash soap on mine, never had any problems. I have had white, tan and 2 black tops, all cleaned the same way.
They've done studies you know.... 60% of the time, it works every time