Find the source of the spread of the insect. Remove dust, dirt, wash, dry floors. If the sewer pipes are old, replace them, they can be distributors. Replace all cracked and damp wooden items. See if there's condensation on the risers and the pipes. Install the air conditioner or fan for air circulation and better ventilation. Most importantly – maintain the dryness in the room.
Wash the floors with salt water or sprinkle salt in the corners of the room. Salt absorbs excess moisture.
Mix 1 part boric acid and 4 parts of chalk and sprinkle the mixture all the places where there are silverfish: baseboards, seams between tiles, door sills, under the bath, sink and toilet. Still sprinkle in the ventilation of the mine that did not come to visit a neighbor bugs. Leave for a week. A month later repeat the operation for the removal of insects, hatched from the delayed larvae. Boric acid is not harmful to Pets and does not smell.
Use pesticides to kill insects ("RAID", "Mole", "Raptor"). Squeeze the gel on a piece of paper and leave it in the place of accumulation of silverfish. Repeat the procedure in 2-3 days.
If you do not mind washing the floor with chlorinated water, use this method. Mix 3 mg of tobacco, red peppers and sodium carbonate (soda ash) to 1 gallon of water and spray the solution on the corners of the room. Wash with bleach in 8 hours.
If you do not fit the above mentioned methods, use a more radical method. Directly in the room in a bucket of quicklime, pour the water, quickly leave and don't come into the room three days! Then carefully remove the bucket, thoroughly ventilate the room, wash the floor. After a couple of days you can sleep, drink or eat.