Thank you for this. I was not aware of a difference in AC vs DC switches. Do you know the underlying difference for this? Does AC arcs easier or something else?

This lamp was converted with the help of my dad and granddad, they should have known better.

This is the lamp, the switch, and the worn out contact due to arcing.

The idea to embed a compact phone charger is a good one. Any recommendations on how wire the plug? Cut it off and solder + heat shrink the cables? The enclosure probably won’t open non-destructively… Embedding the charger in the lamp will also keep the cable as is, meaning I still keep the whole lamp grounded :)