Dynamic cycling contact angle (DCCA) measurements of six liquids from two homologous series (i.e., alkanes and alcohols) on FC-732-coated silicon wafer surfaces were performed using automated axisymmetric drop shape analysis-profile (ADSA-P). Unlike the previous one-cycle measurements that have been made in a number of studies, these cycling contact angle measurements provide more information on the mechanisms of contact angle hysteresis ΞΈ hyst . Both the advancing contact angles ΞΈ a (except for the one measured from the first cycle) and the receding contact angles ΞΈ r obtained from different cycles were found to be time-dependent. By comparing the results between cycles, were obtained ΞΈ a and ΞΈ r values at some specific drop radii. It was found that both ΞΈ a and ΞΈ r decreased with increasing number of cycles. Furthermore, both ΞΈ a and ΞΈ r values obtained at the larger contact radius were larger than those obtained at the smaller radius. The result is plausible in terms of liquid sorption and/or retention by the solid surface: the solid surface modification by the liquid increases with longer solid/ liquid contact, leading to smaller values of ΞΈ a and ΞΈ r . It was also found that contact angle hysteresis ΞΈ hyst , the difference between ΞΈ a and ΞΈ r at each radius, increased initially and then leveled off with increasing number of cycles. The result suggests that processes which occurred on the polymer surface during the experiment, such as liquid sorption and evaporation, will eventually approach a steady state and hence lead to constant hysteresis of the contact angle. This supports the contention that liquid sorption and/or retention is a likely cause of the time dependence of contact angle hysteresis (as well as advancing and receding contact angles). All ΞΈ a data obtained beyond the first cycle and all ΞΈ r data reflect liquid sorption and/or retention by the solid and are therefore not a property of the solid alone. Therefore, only ΞΈ a obtained in the first cycle (on the dry solid) should be used in the calculation of the surface energetics of solids.