How do you restore the finish on the weathertec mats?

[A-Wimoweh]

I bought the black weathertec mats from the Tesla store, and even after scrubbing and a good rinse, they still have some embedded salt and dirt stains that refuse to come out. What works without harming the mats?

 

[David.85D]

Weathertech sells a cleaner and treatment. Works ok. Does restore the faded color.

 

[PhilDavid]

Would Goo Gone be bad for the rubber? That stuff removed everything...

 

[JasJ]