Answer:The Alternative  Durostone wave solder fixture had better useultrasonic cleaning machine

( ultrasonic cleaning machine for industrial parts in addition to wax , degreasing ,
decontamination with efficient and fast , high cleanliness , suitable for electroplating, metal,
electronics , light industry , machinery other industries ) adding water to wash . Also available
neutral cleaning liquid. Try to avoid cleaning with strong acid or alkali solution.Alternative  Durostone
material is sensitive to alcohol; it must not be cleaned alternative Durostone wave solder fixture with
alcohol.