Remove the clutter. Stacking books and papers in piles around your dorm room can create hiding places for crickets. Organize the clutter into file folders or plastic bins with lids. This will give the crickets fewer places to hide.
Turn off the lights. A lot of bugs including crickets are attracted to light. Leaving a light on all night to study can cause crickets to stay longer than desired. Using a book light or flashlight to study or studying at the library can force the crickets to go elsewhere.
Place sticky traps, which are available at many hardware stores, around the dorm room. When a cricket walks across the trap, the glue will cause them to stick to the trap. Once the cricket is trapped, you can dispose of the trap in a trash bag.
Close windows. Crickets are able to jump and fly through windows. Keeping windows closed can prevent them from accessing your room. Additionally, examine the screen on the windows. If there are any holes in the screen, crickets can slip through. Contact the building maintenance to replace any broken screens.
Mix together one part lemon juice, water and molasses in a plastic container. Set it near the areas where crickets have been spotted. The sweet smell will attract the crickets to the liquid. Once inside of the container, they will drown. Dispose of the crickets in a trash bag.