Advantage: Can be applied on all smooth surfaces such as glass or plastic:
Disadvantage: In large colonies, the animals can spread by entering the oil surface, the oil on the disc, so that needs to be cleaned the disc over time.
Application: The film should be applied at the inner edge of about 3 times as wide as the ants are long, without dripping.
Renewal: 2-4 months, depending on colony size and season.
Note: Animals should only come with the "feet" in contact with the oil. In large drop formation is a risk that the animals with the head get in the drops and can choke on oil.