Mean number of cells per cluster (left) and mean cluster energy (right) for a selection of SM as a function of the run index in pp collisions at $\sqrt{s}=$ 13 TeV. Example runs with similar data-taking conditions are displayed. Only clusters with energy above 0.5 GeV were used for the mean estimation. The vertical red line indicates the run at which the 2 last DCal SM were inserted into the readout. The vertical gray lines correspond to the start of different data-taking years.