I had adult braces (upper/lower) for almost three years. I was diligent about everything the ortho told me - which was to stay away from cracker jack and carmel only and that it was ok to deviate from his instruction (rubber bands nearly 24/7 except for eating), then I was to do it for valid reasons (like sports).

The food warnings are because most people are poor flossers and lax in general about teeth cleanings. With braces obviously you can't brush or floss as well - so the likelihood of plaque and food getting stuck is higher. I used a high end water pik type brush and for three years never had a cavity and ate what I wanted.

Given that your braces might be on for a year or two or more, a few hours without bands on the weekends etc are not going to derail your treatment.

If the inside of your lip is getting ripped to shreds, try the wax. Soothing relief.

If anything, the real testament to your involvement in your treatment is how often and well you wear your retainer. Your teeth WILL move back to their original position if not halted. Although I don't visit my ortho, I still wear my retainer 2x week at night. Sometimes after a stressful week, it fits very tightly....indicating they moved slightly.

Good luck and do know you can eat pretty much what you want.