Best remove the Airbag and the Steering wheel completely.
You will need to remove the rear Cowl off the steering wheel held on by 3 screws .
Once this is done you need to remove the screws from the individual trims
Gently prise the rear sections of Trims off with a plastic tool.
Here’s the tricky part…..gently push the the front pieces out by using the back end of a thin paint brush or similar.
Be very gentle as here is where the fastening stalks tend to snap
If they do snap…repair with a decent 2 part glue .
If you got this far ..you now ready to refurbish your trims

Good Luck