coffee stain?
Answers:
Fantastic has a product in a bright blue bottle called Fantastis OXY something. I used it to take the bad coffee stains out of the carpet in my vehicle. It worked great, the carpet is grey again. It also smells great and along with being safe for carpets, it has many other uses listed on the back of the bottle.
Other answers:
u can use a steam cleaner
u can use a steam cleaner
steam carpet cleaner
doo stain