@Jen, you can use Wite-Out, nail polish, a silver Sharpie etc. to make a line on the assembly of the temp dial. Once you find your sweet spot you can put another line that aligns with the first one on the rotating dial itself. This will make it really easy to hit that sweet spot. You can even use different colors on the rotating dial for different uses. For example, a green line for flowers and a yellow line for concentrates.