black spots in carpet

Resolve clears the spots for 90%.. it is available in all stores including walmart,... spray some resolve , presswith tissues till u see the stain out.. and then vaccum it , once it is dried.. i use 1 bottle every month. as my kids keep on spilling something over the carpet all the time.. resolves works well even for the crayon or pen, pencil marks on the wall... i spray some on the wall, and clean with a magic eraser.. it goes off really well..