Botox affected by hot and cold! Within seconds from movement to none... how is this possible?

I had botox several times.Every time the same issue.Just had it done a few weeks ago.When its warm:no movement.But as soon as I wash my face almost all the movement comes back in my forhead, like I have no botox. As soon as I start 'rubbing' my face;warming it up; no movement. I made a video; within seconds you see the difference.. Can't upload it but can send it..