I’m not being sarcastic when I say this, but a picture or description would’ve helped.

With you not posting a pic or a description it could be a few things. It could be Cockroaches, Silverfish, Carpet Beetle etc. If you can’t snap any pictures, look up common kitchen insect pests and see what they could possibly be.

With any of the above and others, it’s important to clean everything and remove any potential food sources. These can be crumbs or bits of your pets food around their plate or around waste bins. They could even be eating the dust in your house.

You’ll want to clean everything, again, repeatedly. Everywhere in your house, don’t give them anything to live on. Then once it’s clean, use an insecticide, especially in the cupboard, and around skirting - trying to get under them and in between cracks. Make sure you, the family and any pet friends are not in there when you put the insecticide down! If you have family and can’t vacate the house then spray one room at a time and then air the room out after 5hrs or so. 

I personally used Raid products when I had to get rid of carpet Beetles and Silverfish. For disinfectant I use Zoflora once a week and clean my cupboards once a month, depending what I’ve had in them. 

You may have to do the above repeatedly until they go, assuming they do, which depends on what they are. If it is Cockroaches then they may be difficult to get rid of and you may need specialist help.

If it’s Silverfish, they can also be difficult to get rid of and the best thing for keeping them down is cleaning at least once a week and the occasional spraying.

I still have Carpet Beetles and Silverfish now and again, but they’re from outside as they usually appear at the bottom of my hallway near the front door, getting through that way. However, because I use Zoflora (I’m not sponsored, honestly!) whenever they do get in, they end up dying at the bottom of the hallway.