The following methods are recommended on how to kill trichomonas on a comforter: If the comforter can be removed and washed, you should have the comforter’s skin and inner lining removed and treated, and the skin should be thoroughly soaked and washed, along with the use of ultraviolet light. If ultraviolet light is not easy to obtain, it can be exposed to daylight for a long time. The inner lining, which cannot usually be washed, also needs to be exposed to sunlight for a long time or sterilized by ultraviolet light. If conditions permit, the surface of the comforter can be heat and pressure sterilized to kill trichomonads on the comforter more thoroughly. In addition, if the comforter cannot be removed and washed, it can be exposed to direct sunlight. If conditions permit, ethylene oxide can be used for sterilization to kill Trichomonas more thoroughly. The above is for reference only, please refer to your doctor for specific medication and treatment.