I have always been concerned about using chemicals for ants indoors....Yes ants can and do get into cushions.... I use plain cinnamon powder for ants inside... It does something to their nervous system so they leave quickly (and it smells better then chemicals and is non poisonous to people and animals).........(for crickets I use moth balls or crystals, strong but it works most insects will leave when this is used).......
You can also put cinnamon sticks in cupboards, storage spaces almost anywhere, be careful it may leave a stain on porous surfaces..
good luck