I got a party q for Christmas and it works well. The one thing that I notice is after approximately 4 hours @ 235 my temps start to drop a couple of degrees at a time and can"t seam to be able to reach that 235 mark. I use kingsford blue and the out side temp was around 29 degrees. The charcoal ring was full when started. I do not know how much is left as my duck was done ( thankfully ). New batteries and the party q is running so I don't be leave its a battery issue. This is the second time using the party q and the first time I didn't use a full ring of fuel and thought that was the problem. This time I used a full ring and same thing Could it be because the Party q is blowing in cold air that it kills the fuel fast? I hope that this is not the case, if it is any tips? I also use water in the water pan. Thanks in advance for any help.