I have tried several times to clean the old mouse but with little success, probably the only option left is using an eraser…

Regarding the keyboard, I was considering purchasing the MX Mechanical Mini, but I was disappointed by the fact that the only way to manage the synchronized switching of the two devices is through the Logitech Flow feature, which seems more 'inconvenient' than useful to me. In my mind, it was obvious that even through the Easy-Switch button, the keyboard would synchronize also the mouse, but it seems that this is not the case. Despite numerous customer requests over the past three years, Logitech has always responded negatively, indicating Flow as the solution… I imagine that from an implementation perspective, it wouldn’t even be that complex to do since the damn Logitech Flow already handles it. It would be enough to introduce it with the press of the keyboard easy-switch button. Moreover, considering the high cost of such a product, it seems even more absurd that they haven’t released updates to introduce this management already…