No stick glucose testers

Assume you're not looking at CGMs as a direct alternative to fingerprick tests?

Otherwise there are lots of gadgets advertised on the internet as "non-invasive" BG meters. People are usually advised not to waste their money. I've always asked people determined to buy one of these things to come back and tell us all if it actually works. Nobody ever has.

In addition, if there was actually tech like this that worked, don't you think the major manufacturers would be all over it?