from this (before):

to this (after):


What you need:
- JML Doktor Power Magic Eraser
- Warm water
- Gliptone leather cleaner and restorer products - GT12 and GT11 see link. http://www.liquidleather.com/car-shop.html
- Lint free cloth to gently apply and wipe away the Gliptone etc.
Step by step guide:
1 - Tear a 2-3" strip of the magic eraser.
2 - Rinse in hot/warm water and squeeze dry.
3 - Gently wipe the steering wheel in one direction working your way around the wheel so as not to wipe dirt back over the area you have just cleaned. You'll see the eraser getting dirty and the wheel will start to appear to look matt again.
4- Rinse the dirt out of the magic eraser under the tap or in another bowl of clean water. Repeat step 3 gradually gently working your way around the steering wheel. Not pressing too hard as it might damage the leather. Keep clear of the stitching too. I doubt water is good for it, and also the stitching causes the magic eraser to break-up and crumble.
5 - Once you are satisfied that the magic eraser is no longer picking up dirt you can then apply the leather cleaner and conditioner as per the instructions on the bottles. Wipe away any excess water and make sure the steering wheel is dry.
5 - Apply the cleaner (GT12) first. Use a a cloth and again work your way around the steering wheel in one direction. Wipe away any excess. Allow to dry.
6 - Apply the conditioner (GT11) again with a cloth working your way around the wheel. Wipe away any excess. Allow to dry and repeat this step again to give it extra conditioner.
My wheel looked terrible, it was shiny and felt dirty. Now its restored and look great for a car of its age plus its got the new matt look and feels soft and thick again, like new. It took about 20mins and has made a huge difference to the interior.
Might go and have a crack at my seats next !