We live in a semi detached house in the UK. Neighbour moved in 2 years ago? I bought an exercise bike. On exercising near enough our party wall I started to smell something like cannabis. The smell was never too strong, whenever I smelt it was volatile, one minute there, next minute gone. That sensitised me, though and I started to look out for it and I discovered that it is always near the door, above the top left corner. My partner doesn't smell it and when he does he says it is not pot. ANyway, he caulked around cracks int he wall and the floor and we insulated our door a bit more. Smell got less strong but still there. He caulked around fire alarm and around the lights on the ceiling. Smell is still there and the problem is I look up everything and I know there is no safe amount of second hand smoke. Partner can't smell it and has been increasingly annoyed by my sniffing and obsessing. The truth is I tend to obsess about my health and I find it annoying that this thing is out of my control. Even when I cannot smell the weed itself I can smell a sort of denser, pricklier smell, which is always there, and if I make a draft I can smell the little corridors of clean air in the denser air. Today I painted the part of the party wall that has hollow sounding bits in it and my partner came home while I was doing it. He wasn't happy to come home to 'chaos' and we had an argument (as you know arguments are never only about the current issue) and he said he absolutely will not do anything more about it and I should just accept the situation. I find that difficult because I quite like fresh air and now it is never fresh in our front room (which is the biggest room, includes the kitchen downstairs). Partner can't smell it and that's that. We talked to the neighbour twice, asking him to open windows when he smokes and if he could do the things we did in our house to insulate. I initiated talking to neighbour because partner wasn't up for it. WHen he did talk to neighbour he kept saying how difficult that was for him and expected me to be grateful. I am not sure if neighbour did anything about it because he is a private chap who only talks to you if he meets you. He seems nice but seems also secretive. I don't think he did any ventillating. So, am I unreasonable if I obsess about the second-hand smoke? It is not as strong as I have read in other people's stories. But it is detectable to me.