I put off shampooing the bedroom carpeting because this summer has been so busy. The old saying, a stitch in time saves 9 fits very well now.
The first picture was just after I vacuumed the bedroom. The second picture was after I applied carpet shampoo in a presoak process. The third was after an hour of shampooing. The fourth was after it dried.
It is a lot better but it is going to need another round of shampooing. Who invented light colored carpeting?