and yes I admit I have a problem. Between the attractive hosts and the interesting remodels, I’ve watched a lot.

Anyway, if there is actual smoke damage then I assume this is a real wood burning fireplace that has some sort of chimney that vents out (maybe brick)? If a real brick fireplace then that can be a lot of work to get rid of. Cleaning should be fairly simple if that is all you want to do. But you could also get fancy with painting the brick and maybe updating the mantle or area around the fireplace.

Some buyers will like the “old school” feel of having a working fireplace. But it would have to be working to add value. And “working” could mean replacing with a gas/electric version that fits in the same spot.

Back to your main question, if there is moisture damage and smoke damage then it is probably worth getting a professional to check it out and give you options for fixing.