Have trouble wiping clean after bowel movements. have to go back and repeat many many times. what could this b? need colonoscopy?

Try A Cool Wet One: Could mean you need more fiber in your diet.Fiber will firm it up, hopefully.Could also mean you don't wait to fully evacuate your exit portal and some gets held-up there at the end.If you have an inflammatory bowel problem(you ARE taking Sulfasalazine!)then you need to follow your diet,including fiber.And Sulfasalazine itself can cause some diarrhea.Use COOL WET toilet paper; it's more efficient.