ok guys here it is..............every week vac the seats to get the dirt out the pores,then wipe with a damp cloth which has a mild pure soap,no dtergents like washing up liquid as this destroys the sealant layer and then goes onto to destroy the pigment/paint layer.
about 2 months again give a good clean a soft nail brush is recomended this time to get ingrained dirt out.then treat with a leather cream,this is important as this will put back into the leather important moisture/oil and should leave a protective wax layer.
things you all should be aware of are the things which is gonna destroy your leather surface,
kids.......self explanatary

heat....drys outthe leather and it starts to crack
detergents....breaks down protective layer
sweat/hand grease........ does the same as detergents......and ten fold if u are on heart tablets
dog sweat.anoither killer.
oh pleasee do not use products meant for saddles,saw a womans leather sofa destroyed by a saddle soap product
hope this is of help