When I sunk it in that nasty, stilty, hood-deep, three week stagnant "puddle" the smell was horrible and no amount of cleaning would get it out as it soaked into the pressed cotten mat (I hesitate to call it carpet). The dusty cloud of fine, talcum silt kept coming out, too. I pulled everything out down to the metal and cleaned it.

I pulled out the rubber mat.
I pulled off all the "fuzzy" carpet.

I went to the local carpet warehouse and went dumpster diving. I got the deepest pile (thickest) shag carpeting I could find. All the big pieces I could find. It wasn't all white, but it was all white-ish.

I oversize-cut it with the original mats, then I cut it to fit as I laid it in. I actually covered more area than the original "pressed cotten fiber" carpet did; that stuff doesn't cover all the floor.

I then put the plastic mat back down over it.

Worked great, better fit, cooler floor, quieter ride, easy to do. Softer floors. And if you screw up, just get another big piece out of the dumpster.

I love the wall to wall shag carpeting, and it was free.