DS18B20 Scrambled LCD HELP!

The first thing to do is think seriously about why you need to do that. Every time you reset, you are starting over again. If you really need to go through the temperatures at the push of a button, use a different button and make a standard loop run on the condition of the button.

You could use a standard loop through several sensors like here

and simply introduce a step where the loop doesn't proceed until a button is pushed. I don't know how you would do that, or even why you would want to, but it won't be hard.