Applying the prevention tip and using an appropriate insect powder on walls near windows and dusting humid corners where they congregate will minimise the problem. A garden insecticide may be used outdoors and on vegetation.
For a heavy Earwig infestation, we would recommend you contact professional pest control company, preferably a member of the IPCA to administer a treatment. A trained professional will have the technical knowledge and access to a range of professional use products and equipment which are not available to the public.