How to prevent Booklice? Prevention is similar to the cure. Try and keep susceptible rooms such as the kitchen and bathroom well ventilated and dry by opening windows as often possible. Always keep your dry foodstuffs such as cereals in a cool dry well-ventilated place. Cleaning out your cupboards regularly, ensuring they are completely dry before putting your food back will help. If you are cooking, boiling the kettle or even just using the washing machine for extended periods of time, then make sure that the kitchen is properly ventilated. For a heavy Booklice infestation, we would recommend you contact professional pest control company, to minimise the problem. 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. Having problems with Booklice? Use a trained professional pest controller.