Silverfish live on protein, so removing food sources helps but will not remove them completely, they will probably move to the bathroom and live off of the shampoo remains in the bath or shower.
To kill them you just need a good flyspray containing a chemical from the pyrethroid family, I recommend Digrain products.
Just spray on floor and bottoms of cupboards and ideally behind the kickboards, let it dry and don’t wash the floor for a while or you’ll remove the chemicals.
I actually like silverfish, they’re cute, i like the way they scuttle about.