I have an old LEGO winch that looks like #73037
It has been "restrung" but it is very stiff and it looks like it has some of the old string stuck between the rotating and non-rotating parts. It also feels a bit gritty so there might be dirt stuck in there.
It looks like the top on each side might come off and if so I would be able to remove the stuck string and clean it.
Does anyone have any advice about taking it apart without damaging it?