or just don't clean her car at all....she'll soon appreciate your efforts 
06MY FFRR Vogue TD6, JE Stage 1 Tune, Chrome Tubes, Full Privacy, Full Fat, Full On.

I could coat her seats with the stuff and watch her slide when she bangs on the breaks!  RRS 2.7 TDV6 HSE Zambezi silver,Alpaca.
On Order - LRX expected 2010
DO NOT CLICK HERE!

When we sold our ML, I cleaned the leather seats with a proper leather cleaner, but it made it so slipper you did move when you braked. It was very easy to get out of the car as you just slid off the seat. I'll never use that stuff again - the only problem is that I can't remember what stuff it was! Matt
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RRS ownership for 1 yr, then D3 for 2 yrs. Then cut back to old bangers and working my way back up through two Peugeots in 6 months. Now got Saab 9-5 2.3t and enjoying the performance!