Meguiar's makes a pretty good foam leather cleaner I like. I don't like anything for the seats in the form of wipes and I've tried several. Lexol is pretty decent - I don't use it for the seats but I do use one of their products for the interior vinyl/rubber/plastic (but not exterior). I've heard the saddle soap thing a time or two before but had forgotten about it until now, so I'll probably try that next. Thanks for bringing it up!

By the way, I actually used a clay bar on my headlights and rubber trim around the doors/windows. The headlights went kinda so-so, but it made a big difference on the trim elements. They looked alright anyway, but they look perfect now. You just have to be careful or clay can get into little crevices and be hard to remove. I think that especially if your VX does a lot of sunbathing, combining the Meguiar's tire gel (I use it on a lot more than just cladding, but not the tires LOL) with an occasional claying might give you a fighting chance at keeping the trim nice. On most cars it seems to degrade rather quickly, and regular washing will not stop it. In fact, if you don't get it dried off well after washing, I think it makes matters worse.