How to remove ultra sticky residue?

[JudgeM]

Hello and happy new year to all.

I have an imported Vitz from Japan. It came with parts of the ERP (Electronic Road Pricing) system still installed, in particular some of the wiring and antennas.

The antennas are adhered on the interior side of the windshield. No use for them here so I want to remove it so I have a nice clear windshield.

I managed to remove the antennas however the sticky residue remained. Its quite sticky (and smelly) . Whats the best way to clean up this residue without damaging the windscreen ?

I've uploaded some pics of the antenna.

Thanks for any advice.