Primitive beasts...

This might help?
How to Get Rid of Silverfish

I've read that any humidity over ~50-60% is not optimal. Although, I have not experimented enough to know the effectiveness of a particular RH. In my understanding, the main problem with high humidity is the potential for mold or bud rot during flowering. From what I quickly read, Silverfish thrive on water and humidity... so dropping that is crucial. I also believe that any plant material is a key staple of the Silverfish diet. Get rid of them lil' Busters!!

Good luck :thumbsup: