Favicon is totally stuck :O

Hi all

I’ve been playing around with some different WordPress-themes, and an old favicon is now stuck to my site at https://www.mikarlsen.dk

It’s a red/brown “S” currently, and i really need to change it.

I’ve tried everything; plugins, deleting all favicon.ico’s i could find via FTP, deleting old themes, cleared the cache, reinstalled the theme – but the darn “S” from a woocommerce them i played with still sticks.

Can anyone identify the problem for me? I’m outta options in my own mind.