Consideration to neighbors: Cleaners in the stairwell
Out of consideration for the neighbors, put cleaners in the entrance area of the stairwell. In our house, the staircase cleaning is divided so that the need to clean on the ground floor to the front door and the basement stairs. The upstairs stairs up to them and the hallway in front of their doors. Now the EC is frequented much more often than the upper floors, at least the part of the front door to the stairs.
I then bought a Sauberläufer and placed between the front door and stairs. So everyone can be in 2 steps on the stairs, without direct contact with the ground. Degree now in the winter with all the slush, which enters some pure, has proven such a cleaners and relaxed the relationship with the neighbors in the EC.
Explanation of the two steps: You step on the outside of the door on a bordered rubber mat on which you already down the first dirt and from there with the next step on the Sauber runner.
