Just my 2 cents on using rubber mats.
Yes, a standard floor mat will get dirty and wet, but it will also dry again by itself and any water in the carpet underneath will also evaporate. Rubber floor mats are intended to keep the water out of your carpet. Unfortunately water trapped underneath will not evaporate and nasty things will start happening. A normal floor mat and running the air conditioner when the interior gets wet is much better imho.
I still remember some of the seventies cars that had rubber 'carpet'. Usually the floor just started to rot through after a couple of years.
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