Some days ago I noticed the light cast from my bike was not steady, despite I was travelling at constant speed. Checking the dynamo when engaged I noticed it was touching on the side of the tire, but below the strip where it is supposed to.
I fixed this, and after just one day of proper working the dinamo head now simply slips on the tire. I ruled out the possibility of too low contact pressure beacuse if I try to roll the wheel backward the dynamo rotates properly.
Should I check something else, or should I better replace the dynamo?