Cockroaches hide in moist dark places and cockroaches are mostly found hiding behind things such as refrigerators, stoves, sinks, inside cabinets, behind appliances, inside appliances etc.
If you see cockroaches out during the day and away from dark places you then have an infestation of roaches and really should get an exterminator in to eliminate the cockroach infestation.
Always pick up food debris, crumbs etc and keep areas dry and clean to avoid roaches.