What is the best way to "shake off rust"

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uyiufiyfcjgfyjyhf

Ive been pursuing other hobbys lately and I have recently come back to chess after 2-3 weeks of not playing. Obviously I'm not as good as I was then and I was wondering what the best way to shake off that rust is or anything you like to do to warm up before you play a session personally I do a puzzle rush but I dont think It's giving me the warm up I need

StockOfHey

Is there a need to shake of rust? Why not turn it back into iron?