Wax Removal

It’s been a while since I’ve removed wax from a board to start over with a clean slate. Before, I would just leave it out in the sun for a little while. Then I’d run a credit card to scrape off as much as I can. They used to have this stuff called “Fire Water” that would completely remove any residue left over. Aside from any pressure dings, the board was as good as new after that.
Now, I really would prefer not leaving my board in the sun. I’m also not sure if Fire Water still exists ... I don’t remember seeing it in any of the local shops.
I used Goo Gone (citric based – used for vehicle applications so as not to damage the clear coat) to remove some left over adhesive when I first bought the board. Worked great but worried that it might be bad for the glass?
What do you guys do? Is there some homemade concoction out there?
Now, I really would prefer not leaving my board in the sun. I’m also not sure if Fire Water still exists ... I don’t remember seeing it in any of the local shops.
I used Goo Gone (citric based – used for vehicle applications so as not to damage the clear coat) to remove some left over adhesive when I first bought the board. Worked great but worried that it might be bad for the glass?
What do you guys do? Is there some homemade concoction out there?