Ordered myself a Xiaomi Air Purifier 2S.
In the summer I just leave my windows open 100% of the time and don't have anything to complain about, but now with it getting colder again my windows look like shit only days after cleaning them.
Let's see if that thing atleast get's me from cleaning the windows every other day to once a week....
I don't have a clue regarding stuff like that so I just bought the Xiaomi one because of quite good reviews and because it's a brand I know, which will make getting replacement-filters probably a bit easier, in comparison to just going with some generic one from Amazon.