Razor handle is too loose. Any ideas?

I didn’t use my dovo Bismarck for some months, so I covered the blade with camellia oil.
Problem is that the oil lubricated well the pin that fastens the blade to the scales and now it is too loose. The blade is moving very easily and it became difficult to strop.
Are there any ideas to strengthen the whole thing in some way to be more maneuverable?
Thank you.

Here's a very informative video about pin tightening by Lynn. Before you start tapping take a paper tissue and try to wipe off and absorb as much of the oil you can from between the scales at and around the pivot.

Thank you Maxililian!
Thanks to Lynn as well.