Maybe mineral spirits would break the glue bond? But it will soak in to the drywall or whatever you’ve stuck them onto.
That will effect proper re-adhesion.
I would call the manufacturer and ask them.
You did write “re-adhere”.
Shovel will be your tool but check this pin https://www.pinterest.com/pin/682295412276961185/?nic=1
Try WD-40, it may work.
Stiff putty knife and scrape off. A blow dryer to soften the adhesive may help in scraping them off.