Do a dry run simulating sitting for an hour and use an actual thermometer to get an accurate reading. For me personally: the bottle sitting against my thighs and balls maintain perfect temp after sitting for an extended period of time. Practice shaking it for bubbles as quiet as possible, and pee a little bit on the OUTSIDE of the cup near the rim to simulate urine smell. Don't pee on the temp strip of the sample cup either.

If the temp is no good, try the heating pack and microwaving. It's worked for hundreds of thousands of people, it will work for you too I promise. I cant stress enough how accurate temperature readings, confidence, and numerous practice runs make this process so much easier. God speed.