No matter how careful you are, dirt, water, and debris inevitably find their way onto your vehicle’s floorboard. Over time, this buildup seeps into the carpet, leaving behind stains and stink.

My sister-in-law’s Toyota RAV4 has had a hard life. It was stolen, found again, repaired, and put back into service. Since then, it’s been commuting about 100 miles daily, transporting high-energy ...