It never fails.
I will think, think, research and try all sorts of solutions and they keep failing.
Then, the thing that actually works to solve the problem was actually staring me in the face the whole time. That’s why I’m now starting to let up a bit when I get puzzled by something because I know the answer will ultimately present itself. I have dealt with a household HVAC puzzle for a long time that is a perfect example of that dynamic. There is a bedroom in our home that is really strange. The room just doesn’t ever get really warm like the rest of the house. Initially, it was my youngest daughter’s room but now it’s the guest room. However the lack of HVAC makes it embarrassing to even offer to guests. I thought it was maybe the fact that the window casing wasn’t properly insulated. However, I reinsulated it and this made no difference. I tried space heaters and all the other things I could think of but I really couldn’t get to the root of the problem. I even had the HVAC guy out to be sure that the furnace was working properly. He told me that the HVAC heating method was in great shape and definitely not the problem. I asked him to take a look at the ductwork and again, no problem. The HVAC tech thought that the problem may be due to the previous owner changing up the air flow by adding additional interior walls. He suggested that I put in room to room ventilators which would even out the temperatures. This simply solution worked of course.