I purchased a Copperhead 5 Series Vertical Smoker this past spring of 2020. I have experienced huge temperature spikes especially on long cooks. I keep the water pan filled and have moved it up from the bottom, too. I've contacted PB, and in a reply they informed me to preheat the grill at 200 degrees F for five minutes and then adjust my temperature. Although this helped, I still experience temp spikes from time to time. Any suggestions and help will be appreciated. Thanks!