Help cleaning the inside of my Impala

I have a 2003 Impala.

The interior has that fake leather look like those hairline cracks.

And its built up like a lot of black crap in there. And its seems like impossible to get out!

Anyone else come across this problem? Even the car wash place hasn't been able to get it completely out. Any suggestions?

If you have an auto body supply house in your area you could check them out and ask for suggestions on products that they carry that might work. There are new products on the market each year, and I'm sure something should work. You could even check your local auto parts store especially if you know of someone who works there that may be knowledgeable in what products they carry that might do the trick. Another place to check out on this site is the "Cars In General " forum. There are 2 sub forums within that forum, "Car Detailing" and "Car Interiors" that might be able to help you as well. Here is a link to that forum:http://www.automotiveforums.com/vbulletin/forumdisplay.php?f=714

check in the owners manual under the care and cleaning of the seats. thats the gm approved way or knights spray 9 and a good tooth brush and wipe it dry then armour all the seat when you think you have it clean.