One of the things I've always done when I've had trouble getting my catheter in, was wear it day and night for 21 days capped off. Never taking it out the whole time. I use gauze to wrap around my hips at the point of the stoma and tie it to the tube and cap it off(use tape to keep it in place in about 3-4 places around the hips). I use a cap from an eye drop medication to push into the end and then pull it out when I need to empty it. This time it didn't work. But it did for 36 years before my stricture and 90 degree curve. I just thought this may help someone else.