We've been in our new house for four weeks. We have four floors but are only using the middle two as top and bottom need work doing on them. The top floor has deep cupboards in the eaves down both sides and when I looked around there were lights inside and they were lined with silver insulation - I have to admit that my first thought was "someone's been growing something". (not entirely unimaginable - there were teenage/twenties boys living here before with their mum). So far - unbothered! But the other day I went up to the top floor and at the top of the stairs there was a strong smell of cannabis smoke - and the person I was with smelt it too and came to the same conclusion. I've just got back from a long weekend away and the smell is even stronger - I smelt it on the floor below quite strongly. I've checked in all the cupboards and there is nothing there (that I can see) - and there were no windows open so it's definitely coming from inside (and I checked in all the cupboards that nobody was there smoking!!)
So my question is, has anyone had any experience getting rid of lingering smoke smells? I genuinely have no idea where to start!