Cigarette smoke

[K]

Hi- I have been struggling with the smell of smoke from a property along my corridor. The smell has come under the fire exit door and a lot of my clothes are ruined and I often have to rewash them. This is an ongoing problem and the smell is extremely noticeable when stepping into the bedroom area. I have put a plastic sealant around the door with little effect.
Does anyone have any advice or have struggled with this themselves? Thanks!