White Vinegar. Dab white vinegar onto the stain, don’t rub. Repeat as necessary. Make sure to follow up with a damp rag to get the white vinegar out of the carpet. Test in a hidden area of the carpet to avoid discoloration.
Milk. Soak a rag in milk, and gently rub the stain. Don’t forget to follow up with a wet rag and regular furniture cleaner to get the milk out!
Pencil Eraser or Dry Erase Marker. Erase those stains away! Alternatively, trace over the permanent marker with a regular dry erase marker and wipe away.