Yes. If seeds and/or nuts remain in the colon at the time of the colonoscopy, they can cause issues with visualization and can clog the suction channel on the camera. Typically, these are cleared out well enough with the prep to not cause any problems. However, adding a couple of glasses of water in addition to the standard instructions, especially with the second half of the prep the morning of the procedure, can help clear these from the large intestine and allow for an adequate exam as scheduled.