You don't have to repeat everything I wrote, what I wrote is already there 
Did you know that you can select a text with the mouse in a message, and then click on the "Quote" text that appears ? Then you get this:
Yes, that will help. I forgot what the minimal value is.
I seriously doubt that.
Can you put one in boiling water ?
The counterfeit DS18B20 can go up to 70 or 80°C, the real ones have no problem at all with 100°C.
The counterfeit DS18B20 start to struggle with a long wires, the real ones not so much.
I made better drawings in kindergarten, but I think it shows the long wires with sensor along it, or a star-configuration with the Arduino board as a spider in the middle of the web:
