It's been 2 days now and I'm a non-smoker!! But my dad is a smoker, so of course he shouldn't, but he smokes in his room with the window open... ㅜㅜ When he enters the room, the smell of cigarettes is in the air... Isn't it okay if he goes into the room too?? I'm staying in a different room, but I leave the door open... Is it okay since it's not direct acting?? I'm even worried about this...