In awesome news - the first paid puzzles are in production and ready to ship out. First sale took about an hour of publishing the site - woah!
With the puzzles having a thick chipboard backer, it likes to crisp up a bit on the cuts. I’ve used baking soda and it cleans them well but leaves a bit of residue. In an effort to make a cleaner product, I dumped my pieces into a piece of Tupperware with some fine grained sea salt; closed it up and tumbled it around for a couple of minutes. Every nook and cranny is clean and no salt hanging to the pieces. Plus, it can be reused several times. I just dump the pieces into a strainer over another container and recapture the salt.
Here is the salt (with a bit of fresh salt poured in to show the difference)
Here is the difference between cleaned and not-cleaned.