cleaning the dash and interior

hi i have a series 3 and am trying to clean the seats and dash but they look good while still wet , but when they dry they go back to a dirty finish i know
some of you will say it adds charactor but i would love to get it back to a finish that looks like or as near as new as i can any tips would be fantastic
cheers for reading and thanks in advance

Back to Black works well for black plastics and rubber.

Autoglym Vinyl and Rubber cleaner will do a good job.

Swarfega ....

Seriously try it apply with a nail brush then wipe/rinse clean.


Though being a series it'll be filthy again in no time at all