Hello everyone, I am thinking about buying this device. Unfortunately, the reviews are ambivalent. Flat (approx. 60m2 tiles, parquet 40m2). First and foremost, I am interested in practical maintenance cleaning (no unbelievable deep cleaning). My question is, what is the wear and tear on the rollers per year if you clean e.g. 100m2 weekly? Can other cleaners be used? All in all, what other costs are incurred annually with this use? Who has experience?