Home carpet traffic areas have tar or asphalt embedded into the carpet. I know the best way to prevent this is not to wear shoes in the house. BUT seeing we are past that, what would you suggest?
Answer: The best way to clean high traffic areas is to deep clean with a full size deep cleaner. First pre-treat the darkened areas with Tough Stain Pre-treat for Carpet & Upholstery. Using 2X Professional Deep Cleaning formula will lift up the dirt in the high traffic areas. After deep cleaning if any stains remain, apply OxyPro® Stain Remover for Carpet or OxyPro® Pet Stain Remover for Carpet to the area. The oxygen-based product will remove leftover discoloration.
Remember to vacuum before deep cleaning to pick up as much dirt and debris as possible, this will prevent your deep cleaner from clogging.