Report "Hello! i have a vision fitness running treadmill. It's older but in good working condition. Everything has been great, except I noticed that the belt started to get a large vertical wrinkle in it, I stopped and loosened the belt to fix the problem. But when i retightened it and ran it it wrinkled and bunched to one side after 15 minutes of running. now I cant get the wrinkles to stay away and stop the treamill from bunching up. What shoudl I do? Ive tried readjusting the tension, on both sides, one side, the other side.... why is it doing this? thanks -lindsay"