I bought my 1150PS in November 2020. It has always struggled to maintain the temp settings below 300 and It's gotten worse over time. I just ran an overnight pork butt, set to 200, and it dropped to 170 and stayed. If I want it to cook at 225 or 250, I have to set it for 300, which it shoots up to in a few minutes and it stays there. I reduce the setting to 225 or 250 and drops and stays at those temps for about 10 minutes, then goes back down to 170 and stays. So in order to accomplish an overnight low & slow setting, I'm up all night playing with the thing. That makes it less efficient than my charcoal/wood smoker. Ideas?