taut tonneaus

[joseph_cianciotti@ccmail_gw.gmosf.com]

Is there a way to stretch a tonneau that's shrunk over time?  I can get it to 
fit left to right, I can't seem to make it all the way to the snaps on the 
dash. 
(I know, a DPO installed snaps instead of studs/lift the dots.)  Even after 
setting it out in the sun to heat up, it's still at least an inch shy.  Thanks 
in advance.

Joseph
67 roadster