Controlling Silverfish

Silverfish Control

Silverfish can only survive in sufficiently damp, crevice-rich environments. If these two conditions are not present, the silverfish will not be able to endure. Air conditioning, dehumidifiers and increased air circulation will sometimes help to decrease silverfish populations wherever practical. Insecticide is not a first choice since the chemicals may cause as much damage as the insects themselves.

Non-lethal

• The most effective way to get rid of silverfish for sure is to keep an area or room tidy, limiting the potential  number of breeding grounds they have. 
• Ensuring showers, baths etc. are rinsed clean and free of any remaining toiletries that may draw hungry silverfish. 
• Leaving the bathroom door open after a shower to diminish the humidity 
• The aroma of a sal ammoniac solution should drive away silverfish inside of 24 hours. 
• To capture silverfish, ensnare them in small glass containers -- silverfish cannot climb up the smooth inside walls. 

Lethal

• Silverfish can also be trapped by sprinkling plaster on a wet, white cotton cloth, put it in a corner overnight, near the silverfish's lair. 
• It is important when stuffing crevices in which silverfish are living or may potentially live to use a filler substance which is either lethal to insects, or does not have materials which would supply the silverfish with a source of food. 
• A 1:1-ratio dispersion of borax or boric acid and sugar is a reliable bait to destroy silverfish (relatively non-toxic to non-insects). 
• Adults can be killed by freezing, but it is tough to destroy the eggs. 

Sanitation alone will not eliminate an infestation, although it may prevent new ones from starting. A large infestation usually means the house has been infested for some time.

Moth crystals placed in boxes in the attic will also help.