Small and big items can be cleaned using an ultrasonic cleaner. If the items to be cleaned are very small, it is advisable to use a glass beaker. Cover the beaker after placing the items and cleaning liquid inside it. Remove the tray from the ultrasonic cleaner and then put the glass beaker inside the cleaner. Run the cleaner as usual. Even though the items are inside the beaker, ultrasonic waves can still reach and clean them.