A stupid question maybe... but has anyone tried putting one or two damp logs on at the end of the day? Obviously they will burn slower as the wood needs to dry out before burning. I am going to give this idea a go, but I guess it will be about fine tuning the dampness. A soaking wet length of pine ain't gonna do the job, but I have had to use damp oak in the past just to keep myself warm and it just goes slower.