Always follow the instructions on your kit. a. You will need to collect a sample from your bowel movement. You can place a sheet of plastic wrap loosely across the toilet bowl to catch the stool or you can use a dry container to collect the stool. Do not let the stool specimen mix with urine. After you obtain a sample, you can flush the remaining stool down the toilet. b. Use a wooden applicator or a brush to smear a thin film of the stool sample onto one of the slots in the test card or slide.