destroy method leaves plugin styles

[jonex2]

If I call the destroy method of the plugin while the sticky header is active, it leaves styles in the markup and the table behaves different.
<thead class="" style="position: static; margin-top: 0px; top: 0px; left: 20px; z-index: 3; width: 591px; visibility: visible;"> <tr> <th colspan="9" style="min-width: 581px; max-width: 581px;">Companies listed on NASDAQ OMX Copenhagen.</th> </tr>...