Warped clear part

The canopy on my Blenheim fits perfectly … except the last panel where it connects into the top of the fuselage. It is warped up. If it were not clear, I would clamp it to a piece of metal and dip it in hot water. Can I do that to a clear part? Anything to be wary of?

If it is still in production, contact your local retailer or Airfix directly for a replacement