Ok, the next topic at hand as far as taking care of your Volvo is Leather Care.... This is a topic I personally like since I work with Leather at work. I make leather Gloves for the Sport of Falconry and also make leather equipment at work for Birds of Prey so I know the ins and out from hands on and also from Vendors we use.... Once you finish detailing your car, the next step is to tackle the inside. Before working on the leather, make sure to Vaccum the interior as if you clean the leather and THEN you Vaccum, you will just make a bigger mess.... Once you Vaccum you will need to wipe down the leather with either a cleaner or personally I use Antibacterial Hand Wipes
http://www.walmart.com/catalog/product. ... d=10314665. These are cheap at Walmart. Most of the problem with leather, is that the cleaning solutions are usually too acidic OR are too much of a base and it is important to keep the leather at a neutral pH! Yes, leather is skin, so too much or not enough will mean cracks and breakage! Hand wipes are designed to clean and kill bacteria in our hands obviously and not dry them so they are great and it has a neutral Ph for a cleaner. Use the wipes and be thorough in wiping ALL leather surfaces including the Steering wheel. You will be surprised how black those wipes get..... Once you are done wiping let surface dry for a little while. I also suggest letting the car sit in direct sunlight for a little while with all the windows closed. What this will do is super heat the interior and allow the pores in the leather to open up and soak any conditioner you apply all the way thru to the nap (back side of the leather) making it stronger. Leathe cracks from drying and Ph changes so if you allow the leather pores to open it will soak up the conditioner all the way thru and that will give the leather as a whole to stay hydrated! Once your interior is heated, start applying the conditioner you choose liberaly. You will see the hot leather "drink" the conditioner. I personally use this stuff called Bick 4
http://www.bickmore.com/bickmore/Leathe ... Bick4.html. It ios a cream conditioner that was made for leather horse saddles and leather horse equipment! So as you can see it was made for heavy duty applications in conditioning. I will take the cream and apply it straight to the leather with my hands almost massaging it into the leather. I do this for the whole car including the steering wheel... Once you are done, close the doors and let the conditioner sit in the sun. You will see in a few minutes the cream will disapear so there won't be any need to wipe down the surfaces! That should be it. If your leather is so stained that you need another cleaner, then I also use this stuff, does an exellent job
http://www.bickmore.com/bickmore/Leathe ... Bick1.html but you can also use products like Lexol. They also make a 2in one cleaner
http://www.bickmore.com/bickmore/Leathe ... Bick5.html but I personally like the cremes. They seem to give the leather more "moisture"... Remember when cleaning leather NOT to use house hold chemicals, soaps unless it's a saddle soap otherwise these items will dry the leather and eventually cracking. Besides cremes you can also use neatsfoot oils and also if you can find it at a pharmacy, fish oil that has had the odor removed. Sounds crazy but it works! This WILL kill you leater interior. Ask anyone whom works or has horses! One thing to NOT DO and that is seal the leather with a spray like Camp dry and/or Scotchguard!. This will seal the pores in the leather and will eventually dry the leather by not allowing the cream or spray cleaner to soak thru to the nap. I will also compile a list of links at the bottom of this write up of other automotive leather cleaners and conditioners. Just remember that this along with Oils and waxes are a subjective topic, so if you find something you like product wise stick with it!
Good Luck cleaning and Happy Motoring!