Silverfish eat starch: book bindings, wallpaper paste, cardboard, photographs, cotton and linen in storage. They want dark, humid and undisturbed, so the linen press, the back of the wardrobe, under the vanity and through the roof void. Damage shows as ragged holes and grazed patches, plus yellow staining and shed skins. They breed slowly, so it has usually been building a while before anyone notices.
Dust is the right tool. It goes into wall cavities, the roof void, behind architraves and skirtings and into the wardrobe frame, and it stays put for months. A liquid wiped over a shelf wears off fast and never reaches them. The older weatherboards through Belmont and Grovedale with original insulation get them worst. Venting the bathroom and getting boxes off the floor helps as much as the treatment.