Some days we wake to find a silverfish (sølvkre) on our bathroom floor. Our neighbours have the same and asked the board if they could do something to get rid of them.
According to FHI they aren't really a problem unless it's out of control and they're eating your antique books and stamp collection.
They're cool little insects though. Fast movers, shiny silver, fluid movements.
https://www.fhi.no/sk/skadedyrhandboka/smadyr-andre/solvkre/ (Link in Norwegian)