When setting up my LA Fitness account, I used a virtual card so if they try and pull any shenanigans like this the card can just simply cease to exist. Many credit cards offer this as a feature, and if not, privacy.com does this as well

Today’s promise turns into tomorrow’s vulnerability. Even if they are 100% honest with that statement, there’s no guarantee they won’t go back on their word in the future.

Are you able to print in PETG at all, or is it just this one specifically that gives you issues?

I don’t think you need to get that fancy with it, I’ve had success with a similar strategy of cooking the burgers as normal, then placing slices of cheese on them with rhe door slightly ajar, and letting them melt with the residule heat