How can I derust, is it still possible?

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Hi, I have been away from sm for about 8 months. I set some good scores, I regret leaving. Now I cannot fc, or 99 any of the charts I played prior to my hiatus. I know people will say to play the game and that everything just gets back into motion with time, but how can I speed it up? I have mindblocked every chart from playing consistently for 30+ hours in a 2 day period. Please help.