If the down sofa is infested, the following measures can be taken:
Clean the sofa: Use a vacuum cleaner to thoroughly clean the sofa to remove dust and dirt, especially seams and corners.
Check the padding: Check the padding of the sofa for any visible damage or holes. If so, replace the filling immediately.
Keep it dry: Place the sofa in a dry environment and ventilate it regularly to avoid moisture and mold.
Use insect repellent: Use insect repellent on the sofa to prevent the breeding of pests.
Call a professional: If the above measures do not solve the problem, or you are not sure how to deal with the pest on the sofa, please contact a professional for treatment.
In short, in order to prevent couch worms, it should be cleaned regularly and kept dry, while taking appropriate precautions. If an infestation is found, immediate measures should be taken to remove it.
Buy some mothballs and put them under the couch. He just ran away.