How can I stop my bicycle dynamo from engaging against the tyre while riding?

Question

http://i224.photobucket.com/albums/dd33/Murderdogs/101_0558.jpg

That little clip in the picture keeps moving while I ride which makes the dynamo engage. It's really annoying because the dynamo produces a lot of drag and I don't want to burn my bulbs out while just riding during the day. Is there any way I can prevent this? Thank you.

Answer 1

On the other end of that spring loaded lever is a small shoulder that engages a tab that holds the dynamo away from the tire. After a while the spring breaks or the shoulder wears away. There is really no way to repair it. Sorry.

Answer 2

Take it off.

Throw it away

And fit a LED rear light. And a rechargeable front one.