Do you have a first floor apartment that would enable easy future entry for the vermin? Check for any additional possible entry points like the tub and/or shower, Kitchen sink drain, small holes around your entry door. Some of these critters can be very brazen and scoot right in the door while you are distracted carrying in the groceries etc. In addition to your cleanup, I would invest in several of the sticky traps or other type and place them around various places of your apartment. Don't forget to put one under the refrigerator and one under the dishwasher. After you do your cleanup, if the problem persists I wuld notify the apartment management and request that an exterminator be called in to treat the whole place....all units.