Washing kinetics of the hook-parameters: Hook parameters refer to the studied three chips A, B and C in the first washing series. The kinetic exponent η estimates the slope of the linear fits. The respective values are given in the figure (see Eq. (10)). Chips A and B are scanned at different time points where the first scan of chip A was performed before washing (see Figure 1). Chip C (triangle) refers to the standard washing protocol suggested by the manufacturer. The different chips provide consistent slopes within ± 0.05. The hook parameters are defined in the Methods-section.