A process for producing superabsorbent polymer particles, comprising polymerization of a monomer solution, comprising a) partly neutralized acrylic acid, b) at least one crosslinker, and c) at least one initiator, drying the resulting polymer gel and grinding the dried polymer gel with a roll mill, wherein the rolls of the roll mill are cleaned by the following procedure i) determining the deflection of the rolls and/or the power consumption of the roll mill, ii) reducing the feed rate to the roll mill or stopping the feed to the roll mill, if the deflection and/or the power consumption increases above a setpoint, iii) optionally increasing the gap width between the rolls of the roll mill, iv) operating the roll mill with reduced feed rate or stopped feed, v) optionally reducing the gap width between the rolls of the roll mill, vi) optionally operating roll mill with reduced gap width until the deflection and/or the power consumption decreases below the setpoint, vii) optionally increasing the gap width between the rolls of the roll mill to the gap width prior to step ii), and viii) increasing the feed rate to the roll mill to the feed rate prior to step ii) or re-starting the feed to the roll mill, wherein the gap width between the rolls of the roll mill must be reduced in step v) if the feed to the roll mill was stopped in step ii) and the gap width between the rolls of the roll mill was increased in step iii), and classifying the resulting polymer particles. a) partly neutralized acrylic acid, b) at least one crosslinker, and c) at least one initiator, drying the resulting polymer gel and grinding the dried polymer gel with a roll mill, wherein the rolls of the roll mill are cleaned by the following procedure i) determining the deflection of the rolls and/or the power consumption of the roll mill, ii) reducing the feed rate to the roll mill or stopping the feed to the roll mill, if the deflection and/or the power consumption increases above a setpoint, iii) optionally increasing the gap width between the rolls of the roll mill, iv) operating the roll mill with reduced feed rate or stopped feed, v) optionally reducing the gap width between the rolls of the roll mill, vi) optionally operating roll mill with reduced gap width until the deflection and/or the power consumption decreases below the setpoint, vii) optionally increasing the gap width between the rolls of the roll mill to the gap width prior to step ii), and viii) increasing the feed rate to the roll mill to the feed rate prior to step ii) or re-starting the feed to the roll mill, i) determining the deflection of the rolls and/or the power consumption of the roll mill, ii) reducing the feed rate to the roll mill or stopping the feed to the roll mill, if the deflection and/or the power consumption increases above a setpoint, iii) optionally increasing the gap width between the rolls of the roll mill, iv) operating the roll mill with reduced feed rate or stopped feed, v) optionally reducing the gap width between the rolls of the roll mill, vi) optionally operating roll mill with reduced gap width until the deflection and/or the power consumption decreases below the setpoint, vii) optionally increasing the gap width between the rolls of the roll mill to the gap width prior to step ii), and viii) increasing the feed rate to the roll mill to the feed rate prior to step ii) or re-starting the feed to the roll mill, wherein the gap width between the rolls of the roll mill must be reduced in step v) if the feed to the roll mill was stopped in step ii) and the gap width between the rolls of the roll mill was increased in step iii), and classifying the resulting polymer particles. <EOS>