Penis Extender Question

When using the extender sometimes while the device is stretching my penis, either the middle of it is soft or its somewhat hard. What could this mean?

Try to use a rice sock with heat and do about 20 jelqs and stretches warm your unit up a then strap in, but just put enough tension for a good stretch.Then when you have to urinate do about 10 to 15 jelqs then strap in again repeat.Hope this helped.