As long as you’re home, you can leave your wax melts on for as long as you like. They can scent a room pretty quickly, so it’s up to you if you want to keep them burning or turn them off to make them last longer.u003cbr/u003eu003cbr/u003eWhether it’s an electric wax warmer or a classic warmer, never leave the burner unattended while it’s being used.