We.moved into a 30's semi a few months ago. It's a lovely house but the front room smells fusty, I only notice it occasionally but the last few days it's got very potent.
DM and DH reckon it smells like strong unfiltered cigarettes and it isn't damp. I think it smells of a cross between old people's house, dog urine and cigarette smoke. It's really quite revolting.
The carpet in there looks clean and it's new and same goes for the curtains. Could it be the old walls? Would a lick of paint help?