Cleaning Fabric Wheel Wells

I agree, difficult to clean. How much is it to replace once you cant stand it anymore?

Not a Tesla only issue unfortunately. A lot of cars are starting to use fabric wheel wells, they deaden sound, are cheaper, and lighter.
And yes they are a PAIN to clean, esp in winters.

2 solutions (none are ideal.. but)

1. If you have air suspension, raise it to the highest setting and pressure wash.
2. Coat with something like this - Johnson S C Inc 21806 Camp Dry Water Repellent Spray-CAMP DRY SPRAY - Walmart.com.

And unfortunately you do have to keep them clean or the crap will accumulate and eventually it might pull the wheel liner off.

I found these
PART 1/3 - 'Wheel, Wheel Well and Tire Care' - How to clean a fabric wheel well liner
PART 2/3 - 'Wheel, Wheel Well and Tire Care' - How to safely clean Model S wheels
PART 3/3 - 'Wheel, Wheel Well and Tire Care' - How to clean and dress tires

That first link is great.

I've been using a self-serve wash bay where the pressurized soap-water is actually warm and makes for a relatively easy job of getting embedded dirt out. That said, in the Bay Area it's not like we have slushy snow-salt to contend with.

I'm considering this http://www.amazon.com/gp/product/B00DNQBFAW/