Car-washing shop can handle it.
Until you feel there is no remaining cleaning agent, you can spill cleaning agent on the stain and rub until it is removed(every kind of detergent is ok, don't worry, and then use the wet towel rub over the place, here to remind you, just do not use too much detergent! otherwise you will need a lot of water afterwards, and you will wet a large area of the carpet, and then use the hair dryer to dry the wet place), Well, if your carpet is small and can be dismantled, you can dismantle it and wash. brush with a toothbrush or small brush, then absorb the water with a dry towel after cleaning it. coke is easy t remove, you can also use wash powder.
If your carpet is small and can be disassembled, then disassemble it and wash. gently brush again and again with a toothbrush or small brush until the stain is removed. coke is easy to clean, you can spray the agent on the satin, and rub with a wet towel.