An apparatus can include a touch-up component. The touch-up component can detect a first charge parameter for a portion of memory of a memory system. The touch-up component can, subsequent to detecting the first charge parameter a particular time interval, detect a second charge parameter for the portion of memory. The touch-up component can determine a charge parameter change per time interval based on the first charge parameter, the second charge parameter, and the particular time interval. The touch-up component can perform a touch-up operation on the portion of memory at a particular time point based on the charge parameter change per time interval.