Keep your leather clean by protecting it with a leather protector and then regular cleaning.
Adding 'conditioners' which generally contain oils and waxes will change the appearance of your leather over time as dirt will build up on the surface and cause a sheen.

Using the correct care methods and products will not alter the factory finish.

The type of leather you have is 'coated' leather. This is essentially a 'painted' leather with a clear coat finish over the top. The leather may or may not be dyed through with aniline dyes prior to the finish coating.

Essentially it is this top coating that needs looking after.
Cleaning is vitally important as the top coat will wear away if allowed to become dirty.
Dirt on the surface will also become ground into the finish by constant abrassion.

'Conditioners', balms, feeds etc (traditionally oil and wax based) cannot penetrate this finish so are not worth applying - they can also leave behind residues on the finish which will only attract more dirt if allowed to remain. 'Conditioners' will not do any protecting on leather even if they say they do as there will not be enough active ingredient in them to do anything.

A protector will make the finish easier to clean and also inhibit dye transfer etc on pale coloured leathers.

Leather however finished has to remain breathable and it will allow the movement of moisture back and forth (transpiration) so the use of water based cleaners and protectors will keep the leather correctly hydrated which is essentail to keeping it in good condition.

Leather needs a little regular care and attention and this can be done with a maintenance product rather than a deep clean which you would then only need to do once or twice a year depending on usage and colour.

The routine for correct care should be

Protect from new
Maintain with a regular clean or maintenance product
Clean with a foam cleaner once or twice a year

Simple steps of cleaning & protecting will prolong the life of the finish on the leather
To replenish the smell of leather use Leather Aroma which will last longer and can be reapplied as often as you like.

Hope this helps
Judyb